diff --git a/typechecking/solutions/jetbrains.mps.typechecking.ui/models/ui.plugin.mps b/typechecking/solutions/jetbrains.mps.typechecking.ui/models/ui.plugin.mps
index d7a2174c..20f73fdf 100644
--- a/typechecking/solutions/jetbrains.mps.typechecking.ui/models/ui.plugin.mps
+++ b/typechecking/solutions/jetbrains.mps.typechecking.ui/models/ui.plugin.mps
@@ -820,12 +820,18 @@
     <property role="TrG5h" value="TypecheckingEditorGroup" />
     <property role="3GE5qa" value="action" />
     <node concept="ftmFs" id="2Rw7mr8T79R" role="ftER_">
-      <node concept="tCFHf" id="6hqFpWnslz9" role="ftvYc">
+      <node concept="tCFHf" id="5lxnBcU5NT5" role="ftvYc">
+        <ref role="tCJdB" node="6hqFpWnsIzU" resolve="MarkNodeType" />
+      </node>
+      <node concept="tCFHf" id="5lxnBcU5Oeg" role="ftvYc">
         <ref role="tCJdB" node="6hqFpWnsaib" resolve="MarkNodeTypeTrace" />
       </node>
       <node concept="tCFHf" id="1isQzel_z7L" role="ftvYc">
         <ref role="tCJdB" node="3Qp4N06byoz" resolve="MarkAllTypes" />
       </node>
+      <node concept="tCFHf" id="5lxnBcU5Oew" role="ftvYc">
+        <ref role="tCJdB" node="7f1nCjLFveK" resolve="MarkAllTypesTrace" />
+      </node>
       <node concept="10WQ6h" id="1isQzelDXbq" role="ftvYc">
         <property role="TrG5h" value="markTypes" />
       </node>
@@ -1025,87 +1031,98 @@
       </node>
     </node>
     <node concept="2tJIrI" id="3mz2_dYD2C2" role="jymVt" />
-    <node concept="2YIFZL" id="41ox5VnqukP" role="jymVt">
-      <property role="TrG5h" value="markTypesAndErrors" />
-      <node concept="37vLTG" id="3mz2_dYDeMI" role="3clF46">
+    <node concept="2YIFZL" id="5lxnBcTU7J1" role="jymVt">
+      <property role="TrG5h" value="scheduleMarkTypesAndErrors" />
+      <node concept="37vLTG" id="5lxnBcTUdcU" role="3clF46">
         <property role="TrG5h" value="mpsProject" />
-        <node concept="3uibUv" id="3mz2_dYDf8W" role="1tU5fm">
+        <node concept="3uibUv" id="5lxnBcTUdcV" role="1tU5fm">
           <ref role="3uigEE" to="z1c4:~MPSProject" resolve="MPSProject" />
         </node>
       </node>
-      <node concept="37vLTG" id="41ox5VnqumW" role="3clF46">
+      <node concept="37vLTG" id="5lxnBcTUdcW" role="3clF46">
         <property role="TrG5h" value="editorComponent" />
-        <node concept="3uibUv" id="41ox5VnquuM" role="1tU5fm">
+        <node concept="3uibUv" id="5lxnBcTUdcX" role="1tU5fm">
           <ref role="3uigEE" to="exr9:~EditorComponent" resolve="EditorComponent" />
         </node>
       </node>
-      <node concept="37vLTG" id="41ox5VnqWuQ" role="3clF46">
+      <node concept="37vLTG" id="5lxnBcTUdcY" role="3clF46">
         <property role="TrG5h" value="root" />
-        <node concept="3Tqbb2" id="41ox5VnqWBh" role="1tU5fm" />
+        <node concept="3Tqbb2" id="5lxnBcTUdcZ" role="1tU5fm" />
       </node>
-      <node concept="37vLTG" id="52a_GfIKajg" role="3clF46">
+      <node concept="37vLTG" id="5lxnBcTUdd0" role="3clF46">
         <property role="TrG5h" value="typeNodes" />
-        <node concept="3uibUv" id="52a_GfIKajh" role="1tU5fm">
+        <node concept="3uibUv" id="5lxnBcTUdd1" role="1tU5fm">
           <ref role="3uigEE" to="33ny:~Map" resolve="Map" />
-          <node concept="3uibUv" id="52a_GfIKaji" role="11_B2D">
+          <node concept="3uibUv" id="5lxnBcTUdd2" role="11_B2D">
             <ref role="3uigEE" to="mhbf:~SNodeReference" resolve="SNodeReference" />
           </node>
-          <node concept="3Tqbb2" id="52a_GfIKajj" role="11_B2D" />
+          <node concept="3Tqbb2" id="5lxnBcTUdd3" role="11_B2D" />
         </node>
       </node>
-      <node concept="37vLTG" id="5tpkEj3Kxfm" role="3clF46">
+      <node concept="37vLTG" id="5lxnBcTUdd4" role="3clF46">
         <property role="TrG5h" value="errors" />
-        <node concept="3uibUv" id="5tpkEj3Kxfn" role="1tU5fm">
+        <node concept="3uibUv" id="5lxnBcTUdd5" role="1tU5fm">
           <ref role="3uigEE" to="33ny:~Map" resolve="Map" />
-          <node concept="3uibUv" id="5tpkEj3Kxfo" role="11_B2D">
+          <node concept="3uibUv" id="5lxnBcTUdd6" role="11_B2D">
             <ref role="3uigEE" to="mhbf:~SNodeReference" resolve="SNodeReference" />
           </node>
-          <node concept="17QB3L" id="5tpkEj3Kxrp" role="11_B2D" />
+          <node concept="17QB3L" id="5lxnBcTUdd7" role="11_B2D" />
         </node>
       </node>
-      <node concept="37vLTG" id="3mz2_dYC7$W" role="3clF46">
+      <node concept="37vLTG" id="5lxnBcTUdd8" role="3clF46">
         <property role="TrG5h" value="traceTabs" />
-        <node concept="_YKpA" id="5cnt3vhcV9D" role="1tU5fm">
-          <node concept="3uibUv" id="6IQb_RxSQFn" role="_ZDj9">
+        <node concept="_YKpA" id="5lxnBcTUdd9" role="1tU5fm">
+          <node concept="3uibUv" id="5lxnBcTUdda" role="_ZDj9">
             <ref role="3uigEE" to="dxuu:~JComponent" resolve="JComponent" />
           </node>
         </node>
       </node>
-      <node concept="3cqZAl" id="41ox5VnqukR" role="3clF45" />
-      <node concept="3Tm1VV" id="41ox5VnqukS" role="1B3o_S" />
-      <node concept="3clFbS" id="41ox5VnqukT" role="3clF47">
-        <node concept="3clFbF" id="41ox5VnqVuL" role="3cqZAp">
-          <node concept="2OqwBi" id="41ox5VnqV_b" role="3clFbG">
-            <node concept="2YIFZM" id="3mz2_dYDeKN" role="2Oq$k0">
+      <node concept="37vLTG" id="5lxnBcTZ$Eq" role="3clF46">
+        <property role="TrG5h" value="subscribeScheduler" />
+        <node concept="3uibUv" id="5lxnBcTZ$Zz" role="1tU5fm">
+          <ref role="3uigEE" to="unkn:~Scheduler" resolve="Scheduler" />
+        </node>
+      </node>
+      <node concept="3uibUv" id="5lxnBcTUcR8" role="3clF45">
+        <ref role="3uigEE" to="unkn:~Completable" resolve="Completable" />
+      </node>
+      <node concept="3Tm1VV" id="5lxnBcTU7J4" role="1B3o_S" />
+      <node concept="3clFbS" id="5lxnBcTU7J5" role="3clF47">
+        <node concept="3clFbF" id="5lxnBcTZ$b9" role="3cqZAp">
+          <node concept="2OqwBi" id="5lxnBcTZ$ba" role="3clFbG">
+            <node concept="2YIFZM" id="5lxnBcTZ$bb" role="2Oq$k0">
               <ref role="37wK5l" node="3mz2_dYD3JK" resolve="get" />
               <ref role="1Pybhc" node="41ox5VnpFrR" resolve="MarkPlugin" />
-              <node concept="37vLTw" id="3mz2_dYDfDI" role="37wK5m">
-                <ref role="3cqZAo" node="3mz2_dYDeMI" resolve="mpsProject" />
+              <node concept="37vLTw" id="5lxnBcTZ$bc" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdcU" resolve="mpsProject" />
               </node>
             </node>
-            <node concept="liA8E" id="41ox5VnqVQk" role="2OqNvi">
-              <ref role="37wK5l" node="41ox5VnqGYM" resolve="doMark" />
-              <node concept="37vLTw" id="41ox5VnqWau" role="37wK5m">
-                <ref role="3cqZAo" node="41ox5VnqumW" resolve="editorComponent" />
+            <node concept="liA8E" id="5lxnBcTZ$bd" role="2OqNvi">
+              <ref role="37wK5l" node="41ox5VnqGYM" resolve="scheduleDoMark" />
+              <node concept="37vLTw" id="5lxnBcTZ$be" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdcW" resolve="editorComponent" />
               </node>
-              <node concept="37vLTw" id="41ox5VnqWI2" role="37wK5m">
-                <ref role="3cqZAo" node="41ox5VnqWuQ" resolve="root" />
+              <node concept="37vLTw" id="5lxnBcTZ$bf" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdcY" resolve="root" />
               </node>
-              <node concept="37vLTw" id="52a_GfIKjBW" role="37wK5m">
-                <ref role="3cqZAo" node="52a_GfIKajg" resolve="typeNodes" />
+              <node concept="37vLTw" id="5lxnBcTZ$bg" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdd0" resolve="typeNodes" />
               </node>
-              <node concept="37vLTw" id="5tpkEj3KCEU" role="37wK5m">
-                <ref role="3cqZAo" node="5tpkEj3Kxfm" resolve="errors" />
+              <node concept="37vLTw" id="5lxnBcTZ$bh" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdd4" resolve="errors" />
               </node>
-              <node concept="37vLTw" id="3mz2_dYC8Vh" role="37wK5m">
-                <ref role="3cqZAo" node="3mz2_dYC7$W" resolve="traceTabs" />
+              <node concept="37vLTw" id="5lxnBcTZ$bi" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTUdd8" resolve="traceTabs" />
+              </node>
+              <node concept="37vLTw" id="5lxnBcTZ_qs" role="37wK5m">
+                <ref role="3cqZAo" node="5lxnBcTZ$Eq" resolve="subscribeScheduler" />
               </node>
             </node>
           </node>
         </node>
       </node>
     </node>
-    <node concept="2tJIrI" id="41ox5VnrMYE" role="jymVt" />
+    <node concept="2tJIrI" id="5lxnBcTTFV3" role="jymVt" />
     <node concept="2YIFZL" id="41ox5VnrNu5" role="jymVt">
       <property role="TrG5h" value="clear" />
       <node concept="37vLTG" id="3mz2_dYDfFr" role="3clF46">
@@ -1254,8 +1271,10 @@
     </node>
     <node concept="2tJIrI" id="52a_GfIDHaI" role="jymVt" />
     <node concept="3clFb_" id="41ox5VnqGYM" role="jymVt">
-      <property role="TrG5h" value="doMark" />
-      <node concept="3cqZAl" id="41ox5VnqGYO" role="3clF45" />
+      <property role="TrG5h" value="scheduleDoMark" />
+      <node concept="3uibUv" id="5lxnBcTUAKb" role="3clF45">
+        <ref role="3uigEE" to="unkn:~Completable" resolve="Completable" />
+      </node>
       <node concept="3Tm6S6" id="3mz2_dYD7Vl" role="1B3o_S" />
       <node concept="3clFbS" id="41ox5VnqGYQ" role="3clF47">
         <node concept="3cpWs8" id="41ox5VnqGc9" role="3cqZAp">
@@ -1276,461 +1295,470 @@
         </node>
         <node concept="3clFbH" id="3WU9yfAbRcf" role="3cqZAp" />
         <node concept="3clFbF" id="5mg4ZgL0L_q" role="3cqZAp">
-          <node concept="2OqwBi" id="5mg4ZgL3$2M" role="3clFbG">
-            <node concept="2OqwBi" id="5mg4ZgL2zu6" role="2Oq$k0">
-              <node concept="2OqwBi" id="5mg4ZgL1WGy" role="2Oq$k0">
-                <node concept="2OqwBi" id="5mg4ZgL131j" role="2Oq$k0">
-                  <node concept="2YIFZM" id="5mg4ZgL0VEQ" role="2Oq$k0">
-                    <ref role="37wK5l" to="unkn:~Completable.fromAction(io.reactivex.functions.Action):io.reactivex.Completable" resolve="fromAction" />
-                    <ref role="1Pybhc" to="unkn:~Completable" resolve="Completable" />
-                    <node concept="1bVj0M" id="5mg4ZgL0XlW" role="37wK5m">
-                      <node concept="3clFbS" id="5mg4ZgL0XlY" role="1bW5cS">
-                        <node concept="3clFbH" id="5mg4ZgL1NtS" role="3cqZAp" />
-                        <node concept="1QHqEK" id="5mg4ZgL9myI" role="3cqZAp">
-                          <node concept="1QHqEC" id="5mg4ZgL9myK" role="1QHqEI">
-                            <node concept="3clFbS" id="5mg4ZgL9myM" role="1bW5cS">
-                              <node concept="3cpWs8" id="3mz2_dYCumS" role="3cqZAp">
-                                <node concept="3cpWsn" id="3mz2_dYCumT" role="3cpWs9">
-                                  <property role="TrG5h" value="ec_tab" />
-                                  <node concept="1LlUBW" id="3mz2_dYCumn" role="1tU5fm">
-                                    <node concept="3uibUv" id="3mz2_dYCums" role="1Lm7xW">
-                                      <ref role="3uigEE" to="exr9:~EditorComponent" resolve="EditorComponent" />
-                                    </node>
-                                    <node concept="_YKpA" id="5cnt3vhcXDL" role="1Lm7xW">
-                                      <node concept="3uibUv" id="6IQb_RxRs4d" role="_ZDj9">
-                                        <ref role="3uigEE" to="dxuu:~JComponent" resolve="JComponent" />
-                                      </node>
-                                    </node>
+          <node concept="2OqwBi" id="5lxnBcTW3LK" role="3clFbG">
+            <node concept="2OqwBi" id="5mg4ZgL1WGy" role="2Oq$k0">
+              <node concept="2OqwBi" id="5mg4ZgL131j" role="2Oq$k0">
+                <node concept="2YIFZM" id="5mg4ZgL0VEQ" role="2Oq$k0">
+                  <ref role="37wK5l" to="unkn:~Completable.fromAction(io.reactivex.functions.Action):io.reactivex.Completable" resolve="fromAction" />
+                  <ref role="1Pybhc" to="unkn:~Completable" resolve="Completable" />
+                  <node concept="1bVj0M" id="5mg4ZgL0XlW" role="37wK5m">
+                    <node concept="3clFbS" id="5mg4ZgL0XlY" role="1bW5cS">
+                      <node concept="3clFbH" id="5mg4ZgL1NtS" role="3cqZAp" />
+                      <node concept="1QHqEK" id="5mg4ZgL9myI" role="3cqZAp">
+                        <node concept="1QHqEC" id="5mg4ZgL9myK" role="1QHqEI">
+                          <node concept="3clFbS" id="5mg4ZgL9myM" role="1bW5cS">
+                            <node concept="3cpWs8" id="3mz2_dYCumS" role="3cqZAp">
+                              <node concept="3cpWsn" id="3mz2_dYCumT" role="3cpWs9">
+                                <property role="TrG5h" value="ec_tab" />
+                                <node concept="1LlUBW" id="3mz2_dYCumn" role="1tU5fm">
+                                  <node concept="3uibUv" id="3mz2_dYCums" role="1Lm7xW">
+                                    <ref role="3uigEE" to="exr9:~EditorComponent" resolve="EditorComponent" />
                                   </node>
-                                  <node concept="2OqwBi" id="3mz2_dYCumU" role="33vP2m">
-                                    <node concept="37vLTw" id="3mz2_dYCumV" role="2Oq$k0">
-                                      <ref role="3cqZAo" node="3WU9yfAbHBC" resolve="markedEditorComponents" />
-                                    </node>
-                                    <node concept="1z4cxt" id="3mz2_dYCumW" role="2OqNvi">
-                                      <node concept="1bVj0M" id="3mz2_dYCumX" role="23t8la">
-                                        <node concept="3clFbS" id="3mz2_dYCumY" role="1bW5cS">
-                                          <node concept="3clFbF" id="3mz2_dYCumZ" role="3cqZAp">
-                                            <node concept="3clFbC" id="3mz2_dYCun0" role="3clFbG">
-                                              <node concept="37vLTw" id="3mz2_dYCun1" role="3uHU7w">
-                                                <ref role="3cqZAo" node="41ox5VnqHMs" resolve="editorComponent" />
-                                              </node>
-                                              <node concept="1LFfDK" id="3mz2_dYCun2" role="3uHU7B">
-                                                <node concept="3cmrfG" id="3mz2_dYCun3" role="1LF_Uc">
-                                                  <property role="3cmrfH" value="0" />
-                                                </node>
-                                                <node concept="37vLTw" id="3mz2_dYCun4" role="1LFl5Q">
-                                                  <ref role="3cqZAo" node="3mz2_dYCun5" resolve="it" />
-                                                </node>
-                                              </node>
-                                            </node>
-                                          </node>
-                                        </node>
-                                        <node concept="Rh6nW" id="3mz2_dYCun5" role="1bW2Oz">
-                                          <property role="TrG5h" value="it" />
-                                          <node concept="2jxLKc" id="3mz2_dYCun6" role="1tU5fm" />
-                                        </node>
-                                      </node>
+                                  <node concept="_YKpA" id="5cnt3vhcXDL" role="1Lm7xW">
+                                    <node concept="3uibUv" id="6IQb_RxRs4d" role="_ZDj9">
+                                      <ref role="3uigEE" to="dxuu:~JComponent" resolve="JComponent" />
                                     </node>
                                   </node>
                                 </node>
-                              </node>
-                              <node concept="3clFbJ" id="3WU9yfAbLuc" role="3cqZAp">
-                                <node concept="3clFbS" id="3WU9yfAbLue" role="3clFbx">
-                                  <node concept="3clFbF" id="3WU9yfAbQyt" role="3cqZAp">
-                                    <node concept="2OqwBi" id="3WU9yfAbQJ8" role="3clFbG">
-                                      <node concept="37vLTw" id="3WU9yfAbQys" role="2Oq$k0">
-                                        <ref role="3cqZAo" node="41ox5VnqGca" resolve="highlightManager" />
-                                      </node>
-                                      <node concept="liA8E" id="3WU9yfAbQMW" role="2OqNvi">
-                                        <ref role="37wK5l" to="exr9:~NodeHighlightManager.clearForOwner(jetbrains.mps.openapi.editor.message.EditorMessageOwner):boolean" resolve="clearForOwner" />
-                                        <node concept="Xjq3P" id="3WU9yfAbQZm" role="37wK5m" />
-                                      </node>
-                                    </node>
+                                <node concept="2OqwBi" id="3mz2_dYCumU" role="33vP2m">
+                                  <node concept="37vLTw" id="3mz2_dYCumV" role="2Oq$k0">
+                                    <ref role="3cqZAo" node="3WU9yfAbHBC" resolve="markedEditorComponents" />
                                   </node>
-                                  <node concept="1DcWWT" id="5cnt3vhd4Cp" role="3cqZAp">
-                                    <node concept="3clFbS" id="5cnt3vhd4Cs" role="2LFqv$">
-                                      <node concept="3clFbF" id="3mz2_dYCVlO" role="3cqZAp">
-                                        <node concept="2OqwBi" id="3mz2_dYCXfc" role="3clFbG">
-                                          <node concept="2YIFZM" id="3mz2_dYCVmT" role="2Oq$k0">
-                                            <ref role="37wK5l" node="7nPD14Nboty" resolve="get" />
-                                            <ref role="1Pybhc" node="7nPD14Nbbbe" resolve="TraceComponent" />
-                                            <node concept="37vLTw" id="3mz2_dYCXdJ" role="37wK5m">
-                                              <ref role="3cqZAo" node="3mz2_dYDlU7" resolve="mpsProject" />
-                                            </node>
-                                          </node>
-                                          <node concept="liA8E" id="3mz2_dYCXij" role="2OqNvi">
-                                            <ref role="37wK5l" node="6IQb_Rxo4au" resolve="closeTab" />
-                                            <node concept="37vLTw" id="5cnt3vhd69F" role="37wK5m">
-                                              <ref role="3cqZAo" node="5cnt3vhd4Ct" resolve="tt" />
-                                            </node>
-                                          </node>
-                                        </node>
-                                      </node>
-                                    </node>
-                                    <node concept="3cpWsn" id="5cnt3vhd4Ct" role="1Duv9x">
-                                      <property role="TrG5h" value="tt" />
-                                      <node concept="3uibUv" id="6IQb_RxRx6U" role="1tU5fm">
-                                        <ref role="3uigEE" to="dxuu:~JComponent" resolve="JComponent" />
-                                      </node>
-                                    </node>
-                                    <node concept="1LFfDK" id="5cnt3vhd4Cy" role="1DdaDG">
-                                      <node concept="3cmrfG" id="5cnt3vhd4Cz" role="1LF_Uc">
-                                        <property role="3cmrfH" value="1" />
-                                      </node>
-                                      <node concept="37vLTw" id="5cnt3vhd4C$" role="1LFl5Q">
-                                        <ref role="3cqZAo" node="3mz2_dYCumT" resolve="ec_tab" />
-                                      </node>
-                                    </node>
-                                  </node>
-                                  <node concept="3clFbH" id="3WU9yfAbRBC" role="3cqZAp" />
-                                </node>
-                                <node concept="3y3z36" id="3mz2_dYCvg1" role="3clFbw">
-                                  <node concept="10Nm6u" id="3mz2_dYCvHF" role="3uHU7w" />
-                                  <node concept="37vLTw" id="3mz2_dYCun7" role="3uHU7B">
-                                    <ref role="3cqZAo" node="3mz2_dYCumT" resolve="ec_tab" />
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+                <node concept="37vLTG" id="5lxnBcTX_is" role="1bW2Oz">
                   <property role="TrG5h" value="messageList" />
-                  <node concept="_YKpA" id="5mg4ZgL4G5V" role="1tU5fm">
-                    <node concept="3uibUv" id="5mg4ZgL4G5W" role="_ZDj9">
+                  <node concept="_YKpA" id="5lxnBcTX_it" role="1tU5fm">
+                    <node concept="3uibUv" id="5lxnBcTX_iu" role="_ZDj9">
                       <ref role="3uigEE" to="kpve:~SimpleEditorMessage" resolve="SimpleEditorMessage" />
                     </node>
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-                        <ref role="3cqZAo" node="41ox5VnqGca" resolve="highlightManager" />
+                <node concept="3clFbS" id="5lxnBcTXoed" role="1bW5cS">
+                  <node concept="3clFbF" id="5lxnBcTXLp1" role="3cqZAp">
+                    <node concept="2OqwBi" id="5lxnBcTYPyG" role="3clFbG">
+                      <node concept="2YIFZM" id="5lxnBcTXNCF" role="2Oq$k0">
+                        <ref role="37wK5l" to="unkn:~Completable.fromAction(io.reactivex.functions.Action):io.reactivex.Completable" resolve="fromAction" />
+                        <ref role="1Pybhc" to="unkn:~Completable" resolve="Completable" />
+                        <node concept="1bVj0M" id="5lxnBcTXQt_" role="37wK5m">
+                          <node concept="3clFbS" id="5lxnBcTXQtA" role="1bW5cS">
+                            <node concept="3clFbH" id="5lxnBcTXSJd" role="3cqZAp" />
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+                              <node concept="2OqwBi" id="41ox5VnqSf1" role="3clFbG">
+                                <node concept="37vLTw" id="41ox5VnqSce" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="41ox5VnqGca" resolve="highlightManager" />
+                                </node>
+                                <node concept="liA8E" id="41ox5VnqSv1" role="2OqNvi">
+                                  <ref role="37wK5l" to="exr9:~NodeHighlightManager.mark(java.util.List):void" resolve="mark" />
+                                  <node concept="37vLTw" id="3BRW86d0OXZ" role="37wK5m">
+                                    <ref role="3cqZAo" node="5lxnBcTX_is" resolve="messageList" />
+                                  </node>
+                                </node>
+                              </node>
+                            </node>
+                            <node concept="3clFbF" id="62MNP_kVxbH" role="3cqZAp">
+                              <node concept="2OqwBi" id="62MNP_kVxrM" role="3clFbG">
+                                <node concept="37vLTw" id="62MNP_kVxbF" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="41ox5VnqGca" resolve="highlightManager" />
+                                </node>
+                                <node concept="liA8E" id="62MNP_kVxtW" role="2OqNvi">
+                                  <ref role="37wK5l" to="exr9:~NodeHighlightManager.repaintAndRebuildEditorMessages():void" resolve="repaintAndRebuildEditorMessages" />
+                                </node>
+                              </node>
+                            </node>
+                            <node concept="3clFbH" id="5lxnBcTXSJi" role="3cqZAp" />
+                          </node>
+                        </node>
                       </node>
-                      <node concept="liA8E" id="41ox5VnqSv1" role="2OqNvi">
-                        <ref role="37wK5l" to="exr9:~NodeHighlightManager.mark(java.util.List):void" resolve="mark" />
-                        <node concept="37vLTw" id="3BRW86d0OXZ" role="37wK5m">
-                          <ref role="3cqZAo" node="5mg4ZgL4Ddi" resolve="messageList" />
+                      <node concept="liA8E" id="5lxnBcTYSnn" role="2OqNvi">
+                        <ref role="37wK5l" to="unkn:~Completable.subscribeOn(io.reactivex.Scheduler):io.reactivex.Completable" resolve="subscribeOn" />
+                        <node concept="37vLTw" id="5lxnBcTYVfE" role="37wK5m">
+                          <ref role="3cqZAo" node="5lxnBcTUEOg" resolve="subscribeScheduler" />
                         </node>
                       </node>
                     </node>
                   </node>
-                  <node concept="3clFbF" id="62MNP_kVxbH" role="3cqZAp">
-                    <node concept="2OqwBi" id="62MNP_kVxrM" role="3clFbG">
-                      <node concept="37vLTw" id="62MNP_kVxbF" role="2Oq$k0">
-                        <ref role="3cqZAo" node="41ox5VnqGca" resolve="highlightManager" />
-                      </node>
-                      <node concept="liA8E" id="62MNP_kVxtW" role="2OqNvi">
-                        <ref role="37wK5l" to="exr9:~NodeHighlightManager.repaintAndRebuildEditorMessages():void" resolve="repaintAndRebuildEditorMessages" />
-                      </node>
-                    </node>
-                  </node>
-                  <node concept="3clFbH" id="5mg4ZgL4qeE" role="3cqZAp" />
                 </node>
               </node>
             </node>
@@ -1775,6 +1803,12 @@
           </node>
         </node>
       </node>
+      <node concept="37vLTG" id="5lxnBcTUEOg" role="3clF46">
+        <property role="TrG5h" value="subscribeScheduler" />
+        <node concept="3uibUv" id="5lxnBcTUJzF" role="1tU5fm">
+          <ref role="3uigEE" to="unkn:~Scheduler" resolve="Scheduler" />
+        </node>
+      </node>
     </node>
     <node concept="2tJIrI" id="41ox5VnqvLK" role="jymVt" />
     <node concept="3clFb_" id="3WU9yfAbUlV" role="jymVt">
@@ -26649,77 +26683,103 @@
       </node>
       <node concept="3Tmbuc" id="Hg6EncFQZO" role="1B3o_S" />
       <node concept="3clFbS" id="Hg6EncbkS1" role="3clF47">
-        <node concept="3clFbF" id="Hg6EncbncW" role="3cqZAp">
-          <node concept="2OqwBi" id="Hg6EncbnP3" role="3clFbG">
-            <node concept="37vLTw" id="Hg6EncbncU" role="2Oq$k0">
+        <node concept="3clFbF" id="5lxnBcU04KQ" role="3cqZAp">
+          <node concept="2OqwBi" id="5lxnBcU05yI" role="3clFbG">
+            <node concept="37vLTw" id="5lxnBcU04KO" role="2Oq$k0">
               <ref role="3cqZAo" node="Hg6EncbkRS" resolve="prevStep" />
             </node>
-            <node concept="liA8E" id="Hg6EncbpkJ" role="2OqNvi">
-              <ref role="37wK5l" to="unkn:~Single.map(io.reactivex.functions.Function):io.reactivex.Single" resolve="map" />
-              <node concept="1bVj0M" id="Hg6EncbqUM" role="37wK5m">
-                <node concept="37vLTG" id="Hg6EncbrFm" role="1bW2Oz">
+            <node concept="liA8E" id="5lxnBcU085M" role="2OqNvi">
+              <ref role="37wK5l" to="unkn:~Single.flatMap(io.reactivex.functions.Function):io.reactivex.Single" resolve="flatMap" />
+              <node concept="1bVj0M" id="5lxnBcU08CP" role="37wK5m">
+                <node concept="37vLTG" id="5lxnBcU09rm" role="1bW2Oz">
                   <property role="TrG5h" value="prev" />
-                  <node concept="3uibUv" id="6IQb_RxDjeB" role="1tU5fm">
+                  <node concept="3uibUv" id="5lxnBcU09rn" role="1tU5fm">
                     <ref role="3uigEE" to="tj24:6IQb_RxlB9v" resolve="CollectTypesStep" />
                   </node>
                 </node>
-                <node concept="3clFbS" id="Hg6EncbqUN" role="1bW5cS">
-                  <node concept="3clFbH" id="6kREIVkm2dh" role="3cqZAp" />
-                  <node concept="3clFbF" id="Hg6EncbtUJ" role="3cqZAp">
-                    <node concept="2YIFZM" id="Hg6EncbtUK" role="3clFbG">
-                      <ref role="1Pybhc" node="41ox5VnpFrR" resolve="MarkPlugin" />
-                      <ref role="37wK5l" node="41ox5VnqukP" resolve="markTypesAndErrors" />
-                      <node concept="37vLTw" id="6kREIVkNRWj" role="37wK5m">
-                        <ref role="3cqZAo" node="6kREIVkNFsd" resolve="mpsProject" />
+                <node concept="3clFbS" id="5lxnBcU08CQ" role="1bW5cS">
+                  <node concept="3clFbH" id="5lxnBcU08SE" role="3cqZAp" />
+                  <node concept="3cpWs8" id="5lxnBcU0kqp" role="3cqZAp">
+                    <node concept="3cpWsn" id="5lxnBcU0kqq" role="3cpWs9">
+                      <property role="TrG5h" value="scheduleMarkTypesAndErrors" />
+                      <node concept="3uibUv" id="5lxnBcU0kpU" role="1tU5fm">
+                        <ref role="3uigEE" to="unkn:~Completable" resolve="Completable" />
                       </node>
-                      <node concept="2OqwBi" id="Hg6EncbtUO" role="37wK5m">
-                        <node concept="Xjq3P" id="Hg6EncbtUP" role="2Oq$k0" />
-                        <node concept="2OwXpG" id="Hg6EncbtUQ" role="2OqNvi">
-                          <ref role="2Oxat5" node="1pPth$lGU8f" resolve="editorComponent" />
+                      <node concept="2YIFZM" id="5lxnBcU0kqr" role="33vP2m">
+                        <ref role="37wK5l" node="5lxnBcTU7J1" resolve="scheduleMarkTypesAndErrors" />
+                        <ref role="1Pybhc" node="41ox5VnpFrR" resolve="MarkPlugin" />
+                        <node concept="37vLTw" id="5lxnBcU0kqs" role="37wK5m">
+                          <ref role="3cqZAo" node="6kREIVkNFsd" resolve="mpsProject" />
                         </node>
-                      </node>
-                      <node concept="2OqwBi" id="Hg6EncbtUR" role="37wK5m">
-                        <node concept="2OqwBi" id="Hg6EncbtUS" role="2Oq$k0">
-                          <node concept="Xjq3P" id="Hg6EncbtUT" role="2Oq$k0" />
-                          <node concept="2OwXpG" id="Hg6EncbtUU" role="2OqNvi">
+                        <node concept="2OqwBi" id="5lxnBcU0kqt" role="37wK5m">
+                          <node concept="Xjq3P" id="5lxnBcU0kqu" role="2Oq$k0" />
+                          <node concept="2OwXpG" id="5lxnBcU0kqv" role="2OqNvi">
                             <ref role="2Oxat5" node="1pPth$lGU8f" resolve="editorComponent" />
                           </node>
                         </node>
-                        <node concept="liA8E" id="Hg6EncbtUV" role="2OqNvi">
-                          <ref role="37wK5l" to="exr9:~EditorComponent.getEditedNode():org.jetbrains.mps.openapi.model.SNode" resolve="getEditedNode" />
+                        <node concept="2OqwBi" id="5lxnBcU0kqw" role="37wK5m">
+                          <node concept="2OqwBi" id="5lxnBcU0kqx" role="2Oq$k0">
+                            <node concept="Xjq3P" id="5lxnBcU0kqy" role="2Oq$k0" />
+                            <node concept="2OwXpG" id="5lxnBcU0kqz" role="2OqNvi">
+                              <ref role="2Oxat5" node="1pPth$lGU8f" resolve="editorComponent" />
+                            </node>
+                          </node>
+                          <node concept="liA8E" id="5lxnBcU0kq$" role="2OqNvi">
+                            <ref role="37wK5l" to="exr9:~EditorComponent.getEditedNode():org.jetbrains.mps.openapi.model.SNode" resolve="getEditedNode" />
+                          </node>
                         </node>
-                      </node>
-                      <node concept="2OqwBi" id="6IQb_RxPObD" role="37wK5m">
-                        <node concept="37vLTw" id="6IQb_RxPNIu" role="2Oq$k0">
-                          <ref role="3cqZAo" node="Hg6EncbrFm" resolve="prev" />
+                        <node concept="2OqwBi" id="5lxnBcU0kq_" role="37wK5m">
+                          <node concept="37vLTw" id="5lxnBcU0kqA" role="2Oq$k0">
+                            <ref role="3cqZAo" node="5lxnBcU09rm" resolve="prev" />
+                          </node>
+                          <node concept="liA8E" id="5lxnBcU0kqB" role="2OqNvi">
+                            <ref role="37wK5l" to="tj24:6IQb_RxlNhw" resolve="getTypeNodes" />
+                          </node>
                         </node>
-                        <node concept="liA8E" id="6IQb_RxPP5r" role="2OqNvi">
-                          <ref role="37wK5l" to="tj24:6IQb_RxlNhw" resolve="getTypeNodes" />
+                        <node concept="2OqwBi" id="5lxnBcU0kqC" role="37wK5m">
+                          <node concept="37vLTw" id="5lxnBcU0kqD" role="2Oq$k0">
+                            <ref role="3cqZAo" node="5lxnBcU09rm" resolve="prev" />
+                          </node>
+                          <node concept="liA8E" id="5lxnBcU0kqE" role="2OqNvi">
+                            <ref role="37wK5l" to="tj24:6IQb_RxlNhC" resolve="getErrors" />
+                          </node>
                         </node>
-                      </node>
-                      <node concept="2OqwBi" id="6IQb_RxPQDW" role="37wK5m">
-                        <node concept="37vLTw" id="6IQb_RxPQ40" role="2Oq$k0">
-                          <ref role="3cqZAo" node="Hg6EncbrFm" resolve="prev" />
+                        <node concept="2OqwBi" id="5lxnBcU0kqF" role="37wK5m">
+                          <node concept="liA8E" id="5lxnBcU0kqG" role="2OqNvi">
+                            <ref role="37wK5l" to="tj24:6IQb_RxxZcl" resolve="getTraceTabComponents" />
+                          </node>
+                          <node concept="37vLTw" id="5lxnBcU0kqH" role="2Oq$k0">
+                            <ref role="3cqZAo" node="5lxnBcU09rm" resolve="prev" />
+                          </node>
                         </node>
-                        <node concept="liA8E" id="6IQb_RxPRci" role="2OqNvi">
-                          <ref role="37wK5l" to="tj24:6IQb_RxlNhC" resolve="getErrors" />
-                        </node>
-                      </node>
-                      <node concept="2OqwBi" id="Hg6EncbtV2" role="37wK5m">
-                        <node concept="liA8E" id="6kREIVl1k82" role="2OqNvi">
-                          <ref role="37wK5l" to="tj24:6IQb_RxxZcl" resolve="getTraceTabComponents" />
-                        </node>
-                        <node concept="37vLTw" id="6IQb_RxSokf" role="2Oq$k0">
-                          <ref role="3cqZAo" node="Hg6EncbrFm" resolve="prev" />
+                        <node concept="37vLTw" id="5lxnBcU0kqI" role="37wK5m">
+                          <ref role="3cqZAo" node="6kREIVkNB3d" resolve="subscribeScheduler" />
                         </node>
                       </node>
                     </node>
                   </node>
-                  <node concept="3clFbH" id="Hg6EncbtWm" role="3cqZAp" />
-                  <node concept="3clFbF" id="Hg6Encbtxl" role="3cqZAp">
-                    <node concept="Xjq3P" id="Hg6Encbtxj" role="3clFbG" />
+                  <node concept="3clFbF" id="5lxnBcU0aba" role="3cqZAp">
+                    <node concept="2OqwBi" id="5lxnBcU0d7B" role="3clFbG">
+                      <node concept="37vLTw" id="5lxnBcU0kqJ" role="2Oq$k0">
+                        <ref role="3cqZAo" node="5lxnBcU0kqq" resolve="scheduleMarkTypesAndErrors" />
+                      </node>
+                      <node concept="liA8E" id="5lxnBcU0eq5" role="2OqNvi">
+                        <ref role="37wK5l" to="unkn:~Completable.andThen(io.reactivex.SingleSource):io.reactivex.Single" resolve="andThen" />
+                        <node concept="2YIFZM" id="5lxnBcU0gP7" role="37wK5m">
+                          <ref role="37wK5l" to="unkn:~Single.fromCallable(java.util.concurrent.Callable):io.reactivex.Single" resolve="fromCallable" />
+                          <ref role="1Pybhc" to="unkn:~Single" resolve="Single" />
+                          <node concept="1bVj0M" id="5lxnBcU0iBX" role="37wK5m">
+                            <node concept="3clFbS" id="5lxnBcU0iBY" role="1bW5cS">
+                              <node concept="3clFbF" id="5lxnBcU0nAW" role="3cqZAp">
+                                <node concept="Xjq3P" id="5lxnBcU0nAU" role="3clFbG" />
+                              </node>
+                            </node>
+                          </node>
+                        </node>
+                      </node>
+                    </node>
                   </node>
-                  <node concept="3clFbH" id="6kREIVkxfHK" role="3cqZAp" />
+                  <node concept="3clFbH" id="5lxnBcU0rmn" role="3cqZAp" />
                 </node>
               </node>
             </node>
diff --git a/typechecking/solutions/jetbrains.mps.typechecking/models/service.mps b/typechecking/solutions/jetbrains.mps.typechecking/models/service.mps
index 40859953..2caaa9fc 100644
--- a/typechecking/solutions/jetbrains.mps.typechecking/models/service.mps
+++ b/typechecking/solutions/jetbrains.mps.typechecking/models/service.mps
@@ -2524,6 +2524,24 @@
                               </node>
                             </node>
                           </node>
+                          <node concept="3clFbF" id="5lxnBcU2yds" role="3cqZAp">
+                            <node concept="1rXfSq" id="5lxnBcU2ydt" role="3clFbG">
+                              <ref role="37wK5l" node="7dgRGU4MD7E" resolve="feedback" />
+                              <node concept="10Nm6u" id="5lxnBcU2y_t" role="37wK5m" />
+                              <node concept="3clFbT" id="5lxnBcU2ydv" role="37wK5m">
+                                <property role="3clFbU" value="false" />
+                              </node>
+                              <node concept="2OqwBi" id="5lxnBcU2ydw" role="37wK5m">
+                                <node concept="37vLTw" id="5lxnBcU2ydx" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                                </node>
+                                <node concept="liA8E" id="5lxnBcU2ydy" role="2OqNvi">
+                                  <ref role="37wK5l" to="wyt6:~Throwable.getMessage():java.lang.String" resolve="getMessage" />
+                                </node>
+                              </node>
+                            </node>
+                          </node>
+                          <node concept="3clFbH" id="5lxnBcU2xVi" role="3cqZAp" />
                           <node concept="3clFbJ" id="4BHjwwGLNrc" role="3cqZAp">
                             <node concept="3clFbS" id="4BHjwwGLNre" role="3clFbx">
                               <node concept="YS8fn" id="4BHjwwGLiJF" role="3cqZAp">
@@ -2643,16 +2661,26 @@
                         <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
                       </node>
                     </node>
-                    <node concept="3eNFk2" id="6kREIVkhGZe" role="3eNLev">
-                      <node concept="2ZW3vV" id="6kREIVkhJiy" role="3eO9$A">
-                        <node concept="3uibUv" id="6kREIVkhJHE" role="2ZW6by">
-                          <ref role="3uigEE" to="wyt6:~RuntimeException" resolve="RuntimeException" />
+                    <node concept="9aQIb" id="6kREIVl2wQO" role="9aQIa">
+                      <node concept="3clFbS" id="6kREIVl2wQP" role="9aQI4">
+                        <node concept="3clFbF" id="5lxnBcU2zaT" role="3cqZAp">
+                          <node concept="1rXfSq" id="5lxnBcU2zaU" role="3clFbG">
+                            <ref role="37wK5l" node="7dgRGU4MD7E" resolve="feedback" />
+                            <node concept="10Nm6u" id="5lxnBcU2zaV" role="37wK5m" />
+                            <node concept="3clFbT" id="5lxnBcU2zaW" role="37wK5m">
+                              <property role="3clFbU" value="false" />
+                            </node>
+                            <node concept="2OqwBi" id="5lxnBcU2zaX" role="37wK5m">
+                              <node concept="37vLTw" id="5lxnBcU2zaY" role="2Oq$k0">
+                                <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                              </node>
+                              <node concept="liA8E" id="5lxnBcU2zaZ" role="2OqNvi">
+                                <ref role="37wK5l" to="wyt6:~Throwable.getMessage():java.lang.String" resolve="getMessage" />
+                              </node>
+                            </node>
+                          </node>
                         </node>
-                        <node concept="37vLTw" id="6kREIVkhIzb" role="2ZW6bz">
-                          <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
-                        </node>
-                      </node>
-                      <node concept="3clFbS" id="6kREIVkhGZg" role="3eOfB_">
+                        <node concept="3clFbH" id="5lxnBcU2yRY" role="3cqZAp" />
                         <node concept="3clFbJ" id="4BHjwwGLkEl" role="3cqZAp">
                           <node concept="3clFbS" id="4BHjwwGLkEn" role="3clFbx">
                             <node concept="3clFbF" id="4BHjwwGLlDS" role="3cqZAp">
@@ -2668,6 +2696,7 @@
                                 </node>
                               </node>
                             </node>
+                            <node concept="3clFbH" id="5lxnBcU208L" role="3cqZAp" />
                           </node>
                           <node concept="3y3z36" id="4BHjwwGLlkr" role="3clFbw">
                             <node concept="10Nm6u" id="4BHjwwGLlos" role="3uHU7w" />
@@ -2675,33 +2704,63 @@
                               <ref role="3cqZAo" node="4BHjwwGKJA$" resolve="failure" />
                             </node>
                           </node>
-                        </node>
-                        <node concept="YS8fn" id="6kREIVkhMBa" role="3cqZAp">
-                          <node concept="1eOMI4" id="6kREIVkhMGP" role="YScLw">
-                            <node concept="10QFUN" id="6kREIVkhMGQ" role="1eOMHV">
-                              <node concept="3uibUv" id="6kREIVkhMGR" role="10QFUM">
-                                <ref role="3uigEE" to="wyt6:~RuntimeException" resolve="RuntimeException" />
-                              </node>
-                              <node concept="37vLTw" id="6kREIVkhMGS" role="10QFUP">
-                                <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                          <node concept="9aQIb" id="5lxnBcU1Xx_" role="9aQIa">
+                            <node concept="3clFbS" id="5lxnBcU1XxA" role="9aQI4">
+                              <node concept="3clFbF" id="5lxnBcU1XRC" role="3cqZAp">
+                                <node concept="37vLTI" id="5lxnBcU1YsN" role="3clFbG">
+                                  <node concept="37vLTw" id="5lxnBcU1YOb" role="37vLTx">
+                                    <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                                  </node>
+                                  <node concept="2OqwBi" id="5lxnBcU1Zba" role="37vLTJ">
+                                    <node concept="Xjq3P" id="5lxnBcU1Zwz" role="2Oq$k0" />
+                                    <node concept="2OwXpG" id="5lxnBcU1ZR6" role="2OqNvi">
+                                      <ref role="2Oxat5" node="4BHjwwGKJA$" resolve="failure" />
+                                    </node>
+                                  </node>
+                                </node>
                               </node>
                             </node>
                           </node>
                         </node>
                         <node concept="3clFbH" id="6kREIVl2x1f" role="3cqZAp" />
-                      </node>
-                    </node>
-                    <node concept="9aQIb" id="6kREIVl2wQO" role="9aQIa">
-                      <node concept="3clFbS" id="6kREIVl2wQP" role="9aQI4">
-                        <node concept="YS8fn" id="6kREIVl2xqg" role="3cqZAp">
-                          <node concept="2ShNRf" id="6kREIVl2xGY" role="YScLw">
-                            <node concept="1pGfFk" id="6kREIVl2zK2" role="2ShVmc">
-                              <ref role="37wK5l" to="wyt6:~RuntimeException.&lt;init&gt;(java.lang.String,java.lang.Throwable)" resolve="RuntimeException" />
-                              <node concept="Xl_RD" id="6kREIVl2$Q8" role="37wK5m">
-                                <property role="Xl_RC" value="unexpected failure" />
+                        <node concept="3clFbJ" id="5lxnBcU20Lc" role="3cqZAp">
+                          <node concept="3clFbS" id="5lxnBcU20Le" role="3clFbx">
+                            <node concept="YS8fn" id="6kREIVkhMBa" role="3cqZAp">
+                              <node concept="1eOMI4" id="6kREIVkhMGP" role="YScLw">
+                                <node concept="10QFUN" id="6kREIVkhMGQ" role="1eOMHV">
+                                  <node concept="3uibUv" id="6kREIVkhMGR" role="10QFUM">
+                                    <ref role="3uigEE" to="wyt6:~RuntimeException" resolve="RuntimeException" />
+                                  </node>
+                                  <node concept="37vLTw" id="6kREIVkhMGS" role="10QFUP">
+                                    <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                                  </node>
+                                </node>
                               </node>
-                              <node concept="37vLTw" id="6kREIVl2$2K" role="37wK5m">
-                                <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                            </node>
+                            <node concept="3clFbH" id="5lxnBcU23PJ" role="3cqZAp" />
+                          </node>
+                          <node concept="2ZW3vV" id="5lxnBcU21HN" role="3clFbw">
+                            <node concept="3uibUv" id="5lxnBcU225s" role="2ZW6by">
+                              <ref role="3uigEE" to="wyt6:~RuntimeException" resolve="RuntimeException" />
+                            </node>
+                            <node concept="37vLTw" id="5lxnBcU216T" role="2ZW6bz">
+                              <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                            </node>
+                          </node>
+                          <node concept="9aQIb" id="5lxnBcU23$n" role="9aQIa">
+                            <node concept="3clFbS" id="5lxnBcU23$o" role="9aQI4">
+                              <node concept="YS8fn" id="6kREIVl2xqg" role="3cqZAp">
+                                <node concept="2ShNRf" id="6kREIVl2xGY" role="YScLw">
+                                  <node concept="1pGfFk" id="6kREIVl2zK2" role="2ShVmc">
+                                    <ref role="37wK5l" to="wyt6:~RuntimeException.&lt;init&gt;(java.lang.String,java.lang.Throwable)" resolve="RuntimeException" />
+                                    <node concept="Xl_RD" id="6kREIVl2$Q8" role="37wK5m">
+                                      <property role="Xl_RC" value="unexpected failure" />
+                                    </node>
+                                    <node concept="37vLTw" id="6kREIVl2$2K" role="37wK5m">
+                                      <ref role="3cqZAo" node="6kREIVkftXC" resolve="t" />
+                                    </node>
+                                  </node>
+                                </node>
                               </node>
                             </node>
                           </node>
@@ -2723,137 +2782,6 @@
       </node>
     </node>
     <node concept="2tJIrI" id="1pPth$lMqse" role="jymVt" />
-    <node concept="3clFb_" id="1N_0WA5JUy$" role="jymVt">
-      <property role="TrG5h" value="updateFeedback" />
-      <node concept="37vLTG" id="6kREIVkKcW1" role="3clF46">
-        <property role="TrG5h" value="step" />
-        <node concept="3uibUv" id="6kREIVkKih7" role="1tU5fm">
-          <ref role="3uigEE" node="1pPth$lAzAx" resolve="Step" />
-          <node concept="3qTvmN" id="6kREIVkKj5W" role="11_B2D" />
-        </node>
-      </node>
-      <node concept="37vLTG" id="1N_0WA5JWLd" role="3clF46">
-        <property role="TrG5h" value="success" />
-        <node concept="10P_77" id="1N_0WA5JX1k" role="1tU5fm" />
-      </node>
-      <node concept="37vLTG" id="1N_0WA5Kg9W" role="3clF46">
-        <property role="TrG5h" value="errorMsg" />
-        <node concept="17QB3L" id="1N_0WA5Kgka" role="1tU5fm" />
-      </node>
-      <node concept="3uibUv" id="1N_0WA5K2wG" role="3clF45">
-        <ref role="3uigEE" to="wyt6:~StringBuilder" resolve="StringBuilder" />
-      </node>
-      <node concept="3Tm6S6" id="1N_0WA5K01o" role="1B3o_S" />
-      <node concept="3clFbS" id="1N_0WA5JUyC" role="3clF47">
-        <node concept="3cpWs8" id="1N_0WA5JZX0" role="3cqZAp">
-          <node concept="3cpWsn" id="1N_0WA5JZX1" role="3cpWs9">
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-            <node concept="3cpWsb" id="1N_0WA5JZX2" role="1tU5fm" />
-            <node concept="FJ1c_" id="1N_0WA5JZX3" role="33vP2m">
-              <node concept="1eOMI4" id="1N_0WA5JZX4" role="3uHU7B">
-                <node concept="3cpWsd" id="1N_0WA5JZX5" role="1eOMHV">
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-                    <node concept="37vLTw" id="6kREIVkKkhT" role="2Oq$k0">
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-                    <node concept="liA8E" id="6kREIVkKkXs" role="2OqNvi">
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-                  </node>
-                  <node concept="2YIFZM" id="1N_0WA5JZX7" role="3uHU7B">
-                    <ref role="37wK5l" to="wyt6:~System.nanoTime():long" resolve="nanoTime" />
-                    <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
-                  </node>
-                </node>
-              </node>
-              <node concept="1adDum" id="1N_0WA5JZX8" role="3uHU7w">
-                <property role="1adDun" value="1000000L" />
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-          </node>
-        </node>
-        <node concept="3clFbF" id="1N_0WA5JWB6" role="3cqZAp">
-          <node concept="2OqwBi" id="1N_0WA5JWB7" role="3clFbG">
-            <node concept="37vLTw" id="1N_0WA5JWB8" role="2Oq$k0">
-              <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
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-            <node concept="liA8E" id="1N_0WA5JWB9" role="2OqNvi">
-              <ref role="37wK5l" to="wyt6:~StringBuilder.append(java.lang.String):java.lang.StringBuilder" resolve="append" />
-              <node concept="2YIFZM" id="1N_0WA5JWBa" role="37wK5m">
-                <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
-                <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...):java.lang.String" resolve="format" />
-                <node concept="3cpWs3" id="1N_0WA5JWBb" role="37wK5m">
-                  <node concept="Xl_RD" id="1N_0WA5JWBc" role="3uHU7w">
-                    <property role="Xl_RC" value=" -- %s (took %2$Ts.%2$TLs)\n" />
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-                  <node concept="1eOMI4" id="1N_0WA5JWBd" role="3uHU7B">
-                    <node concept="3K4zz7" id="1N_0WA5JWBe" role="1eOMHV">
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-                      <node concept="37vLTw" id="1N_0WA5K1Lo" role="3K4Cdx">
-                        <ref role="3cqZAo" node="1N_0WA5JWLd" resolve="success" />
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-                      <node concept="Xl_RD" id="1N_0WA5JWBh" role="3K4E3e">
-                        <property role="Xl_RC" value="OK" />
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-                <node concept="2OqwBi" id="6kREIVkKleM" role="37wK5m">
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-                  <node concept="liA8E" id="6kREIVkKleP" role="2OqNvi">
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-                    <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
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-                  <node concept="liA8E" id="1N_0WA5Kln7" role="2OqNvi">
-                    <ref role="37wK5l" to="wyt6:~StringBuilder.append(java.lang.String):java.lang.StringBuilder" resolve="append" />
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-                  </node>
-                </node>
-                <node concept="liA8E" id="1N_0WA5Kmgw" role="2OqNvi">
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-                    <property role="Xl_RC" value="\n" />
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-            </node>
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-            <node concept="37vLTw" id="1N_0WA5Ki92" role="3uHU7B">
-              <ref role="3cqZAo" node="1N_0WA5Kg9W" resolve="errorMsg" />
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-          </node>
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-        <node concept="3clFbF" id="1N_0WA5K57p" role="3cqZAp">
-          <node concept="37vLTw" id="1N_0WA5K57n" role="3clFbG">
-            <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
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-    </node>
-    <node concept="2tJIrI" id="Hg6Enc2hBq" role="jymVt" />
     <node concept="3clFb_" id="7dgRGU4MD7E" role="jymVt">
       <property role="TrG5h" value="feedback" />
       <node concept="3cqZAl" id="7dgRGU4MD7F" role="3clF45" />
@@ -2951,6 +2879,148 @@
         <node concept="17QB3L" id="1N_0WA5Kdfa" role="1tU5fm" />
       </node>
     </node>
+    <node concept="2tJIrI" id="5lxnBcU2sRW" role="jymVt" />
+    <node concept="3clFb_" id="1N_0WA5JUy$" role="jymVt">
+      <property role="TrG5h" value="updateFeedback" />
+      <node concept="37vLTG" id="6kREIVkKcW1" role="3clF46">
+        <property role="TrG5h" value="step" />
+        <node concept="3uibUv" id="6kREIVkKih7" role="1tU5fm">
+          <ref role="3uigEE" node="1pPth$lAzAx" resolve="Step" />
+          <node concept="3qTvmN" id="6kREIVkKj5W" role="11_B2D" />
+        </node>
+      </node>
+      <node concept="37vLTG" id="1N_0WA5JWLd" role="3clF46">
+        <property role="TrG5h" value="success" />
+        <node concept="10P_77" id="1N_0WA5JX1k" role="1tU5fm" />
+      </node>
+      <node concept="37vLTG" id="1N_0WA5Kg9W" role="3clF46">
+        <property role="TrG5h" value="errorMsg" />
+        <node concept="17QB3L" id="1N_0WA5Kgka" role="1tU5fm" />
+      </node>
+      <node concept="3uibUv" id="1N_0WA5K2wG" role="3clF45">
+        <ref role="3uigEE" to="wyt6:~StringBuilder" resolve="StringBuilder" />
+      </node>
+      <node concept="3Tm6S6" id="1N_0WA5K01o" role="1B3o_S" />
+      <node concept="3clFbS" id="1N_0WA5JUyC" role="3clF47">
+        <node concept="3clFbJ" id="5lxnBcU2zYL" role="3cqZAp">
+          <node concept="3clFbS" id="5lxnBcU2zYN" role="3clFbx">
+            <node concept="3cpWs8" id="1N_0WA5JZX0" role="3cqZAp">
+              <node concept="3cpWsn" id="1N_0WA5JZX1" role="3cpWs9">
+                <property role="TrG5h" value="elapsed" />
+                <node concept="3cpWsb" id="1N_0WA5JZX2" role="1tU5fm" />
+                <node concept="FJ1c_" id="1N_0WA5JZX3" role="33vP2m">
+                  <node concept="1eOMI4" id="1N_0WA5JZX4" role="3uHU7B">
+                    <node concept="3cpWsd" id="1N_0WA5JZX5" role="1eOMHV">
+                      <node concept="2OqwBi" id="6kREIVkKjUZ" role="3uHU7w">
+                        <node concept="37vLTw" id="6kREIVkKkhT" role="2Oq$k0">
+                          <ref role="3cqZAo" node="6kREIVkKcW1" resolve="step" />
+                        </node>
+                        <node concept="liA8E" id="6kREIVkKkXs" role="2OqNvi">
+                          <ref role="37wK5l" node="6kREIVkG1Hg" resolve="getStartTime" />
+                        </node>
+                      </node>
+                      <node concept="2YIFZM" id="1N_0WA5JZX7" role="3uHU7B">
+                        <ref role="37wK5l" to="wyt6:~System.nanoTime():long" resolve="nanoTime" />
+                        <ref role="1Pybhc" to="wyt6:~System" resolve="System" />
+                      </node>
+                    </node>
+                  </node>
+                  <node concept="1adDum" id="1N_0WA5JZX8" role="3uHU7w">
+                    <property role="1adDun" value="1000000L" />
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+            <node concept="3clFbF" id="1N_0WA5JWB6" role="3cqZAp">
+              <node concept="2OqwBi" id="1N_0WA5JWB7" role="3clFbG">
+                <node concept="37vLTw" id="1N_0WA5JWB8" role="2Oq$k0">
+                  <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
+                </node>
+                <node concept="liA8E" id="1N_0WA5JWB9" role="2OqNvi">
+                  <ref role="37wK5l" to="wyt6:~StringBuilder.append(java.lang.String):java.lang.StringBuilder" resolve="append" />
+                  <node concept="2YIFZM" id="1N_0WA5JWBa" role="37wK5m">
+                    <ref role="1Pybhc" to="wyt6:~String" resolve="String" />
+                    <ref role="37wK5l" to="wyt6:~String.format(java.lang.String,java.lang.Object...):java.lang.String" resolve="format" />
+                    <node concept="3cpWs3" id="1N_0WA5JWBb" role="37wK5m">
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+                        <property role="Xl_RC" value=" -- %s (took %2$Ts.%2$TLs)\n" />
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+                      <node concept="1eOMI4" id="1N_0WA5JWBd" role="3uHU7B">
+                        <node concept="3K4zz7" id="1N_0WA5JWBe" role="1eOMHV">
+                          <node concept="Xl_RD" id="1N_0WA5JWBf" role="3K4GZi">
+                            <property role="Xl_RC" value="ERROR" />
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+                          <node concept="37vLTw" id="1N_0WA5K1Lo" role="3K4Cdx">
+                            <ref role="3cqZAo" node="1N_0WA5JWLd" resolve="success" />
+                          </node>
+                          <node concept="Xl_RD" id="1N_0WA5JWBh" role="3K4E3e">
+                            <property role="Xl_RC" value="OK" />
+                          </node>
+                        </node>
+                      </node>
+                    </node>
+                    <node concept="2OqwBi" id="6kREIVkKleM" role="37wK5m">
+                      <node concept="37vLTw" id="6kREIVkKlLr" role="2Oq$k0">
+                        <ref role="3cqZAo" node="6kREIVkKcW1" resolve="step" />
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+                      <node concept="liA8E" id="6kREIVkKleP" role="2OqNvi">
+                        <ref role="37wK5l" node="1pPth$lL0jk" resolve="info" />
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+                    </node>
+                    <node concept="37vLTw" id="1N_0WA5K275" role="37wK5m">
+                      <ref role="3cqZAo" node="1N_0WA5JZX1" resolve="elapsed" />
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+                </node>
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+            </node>
+          </node>
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+              <ref role="3cqZAo" node="6kREIVkKcW1" resolve="step" />
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+                    <ref role="3cqZAo" node="1pPth$lAEQs" resolve="feedback" />
+                  </node>
+                  <node concept="liA8E" id="1N_0WA5Kln7" role="2OqNvi">
+                    <ref role="37wK5l" to="wyt6:~StringBuilder.append(java.lang.String):java.lang.StringBuilder" resolve="append" />
+                    <node concept="37vLTw" id="1N_0WA5KlZs" role="37wK5m">
+                      <ref role="3cqZAo" node="1N_0WA5Kg9W" resolve="errorMsg" />
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+                  </node>
+                </node>
+                <node concept="liA8E" id="1N_0WA5Kmgw" role="2OqNvi">
+                  <ref role="37wK5l" to="wyt6:~StringBuilder.append(java.lang.String):java.lang.StringBuilder" resolve="append" />
+                  <node concept="Xl_RD" id="1N_0WA5Km$P" role="37wK5m">
+                    <property role="Xl_RC" value="\n" />
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+                </node>
+              </node>
+            </node>
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