diff --git a/coderules/solutions/jetbrains.mps.coderules.ui/models/plugin.mps b/coderules/solutions/jetbrains.mps.coderules.ui/models/plugin.mps
index 04809c87..f2d2e6e0 100644
--- a/coderules/solutions/jetbrains.mps.coderules.ui/models/plugin.mps
+++ b/coderules/solutions/jetbrains.mps.coderules.ui/models/plugin.mps
@@ -605,6 +605,7 @@
       <concept id="1240687580870" name="jetbrains.mps.baseLanguage.collections.structure.JoinOperation" flags="nn" index="3uJxvA">
         <child id="1240687658305" name="delimiter" index="3uJOhx" />
       </concept>
+      <concept id="1165530316231" name="jetbrains.mps.baseLanguage.collections.structure.IsEmptyOperation" flags="nn" index="1v1jN8" />
       <concept id="7125221305512719026" name="jetbrains.mps.baseLanguage.collections.structure.CollectionType" flags="in" index="3vKaQO" />
       <concept id="1225711141656" name="jetbrains.mps.baseLanguage.collections.structure.ListElementAccessExpression" flags="nn" index="1y4W85">
         <child id="1225711182005" name="list" index="1y566C" />
@@ -27491,22 +27492,6 @@
         <node concept="3clFbH" id="2qsG4AwM1JP" role="3cqZAp" />
         <node concept="3clFbJ" id="2qsG4AwM2KB" role="3cqZAp">
           <node concept="3clFbS" id="2qsG4AwM2KD" role="3clFbx">
-            <node concept="3cpWs8" id="2qsG4AwMg0Z" role="3cqZAp">
-              <node concept="3cpWsn" id="2qsG4AwMg10" role="3cpWs9">
-                <property role="TrG5h" value="traceEvents" />
-                <node concept="3uibUv" id="2qsG4AwMg0_" role="1tU5fm">
-                  <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
-                </node>
-                <node concept="2OqwBi" id="2qsG4AwMg11" role="33vP2m">
-                  <node concept="37vLTw" id="2qsG4AwMg12" role="2Oq$k0">
-                    <ref role="3cqZAo" node="2qsG4AwFsrf" resolve="traceObject" />
-                  </node>
-                  <node concept="liA8E" id="2qsG4AwMg13" role="2OqNvi">
-                    <ref role="37wK5l" to="1yqb:2qsG4AwM6p0" resolve="getTraceEvents" />
-                  </node>
-                </node>
-              </node>
-            </node>
             <node concept="3clFbJ" id="2mhJggjAa_4" role="3cqZAp">
               <node concept="3clFbS" id="2mhJggjAa_6" role="3clFbx">
                 <node concept="3clFbF" id="2mhJggjAbUl" role="3cqZAp">
@@ -27535,295 +27520,327 @@
                 </node>
                 <node concept="3clFbH" id="2mhJggjAbl4" role="3cqZAp" />
               </node>
-              <node concept="3clFbC" id="2mhJggjAbd2" role="3clFbw">
-                <node concept="10Nm6u" id="2mhJggjAbkp" role="3uHU7w" />
-                <node concept="37vLTw" id="2mhJggjAaYu" role="3uHU7B">
-                  <ref role="3cqZAo" node="2qsG4AwMg10" resolve="traceEvents" />
+              <node concept="2OqwBi" id="5MK8bDySCzI" role="3clFbw">
+                <node concept="2OqwBi" id="5MK8bDySBJw" role="2Oq$k0">
+                  <node concept="37vLTw" id="5MK8bDySBJx" role="2Oq$k0">
+                    <ref role="3cqZAo" node="2qsG4AwFsrf" resolve="traceObject" />
+                  </node>
+                  <node concept="liA8E" id="5MK8bDySBJy" role="2OqNvi">
+                    <ref role="37wK5l" to="1yqb:2qsG4AwM6p0" resolve="getTraceEvents" />
+                  </node>
                 </node>
+                <node concept="1v1jN8" id="5MK8bDySFI6" role="2OqNvi" />
               </node>
               <node concept="9aQIb" id="2mhJggjAdgq" role="9aQIa">
                 <node concept="3clFbS" id="2mhJggjAdgr" role="9aQI4">
-                  <node concept="3cpWs8" id="2daneBOT1Ck" role="3cqZAp">
-                    <node concept="3cpWsn" id="2daneBOT1Cl" role="3cpWs9">
-                      <property role="TrG5h" value="activationTrace" />
-                      <node concept="3uibUv" id="2daneBOT1Cm" role="1tU5fm">
-                        <ref role="3uigEE" node="7nPD14Nbbbe" resolve="TraceComponent" />
-                      </node>
-                      <node concept="2YIFZM" id="2daneBOT1Cn" role="33vP2m">
-                        <ref role="1Pybhc" node="7nPD14Nbbbe" resolve="TraceComponent" />
-                        <ref role="37wK5l" node="7nPD14Nboty" resolve="get" />
-                        <node concept="37vLTw" id="2qsG4AwM1YI" role="37wK5m">
-                          <ref role="3cqZAo" node="2qsG4AwM11s" resolve="mpsProject" />
-                        </node>
-                      </node>
-                    </node>
-                  </node>
-                  <node concept="3clFbJ" id="2daneBOUCgQ" role="3cqZAp">
-                    <node concept="3clFbS" id="2daneBOUCgS" role="3clFbx">
-                      <node concept="3cpWs8" id="2daneBOT1Cp" role="3cqZAp">
-                        <node concept="3cpWsn" id="2daneBOT1Cq" role="3cpWs9">
-                          <property role="TrG5h" value="openedTab" />
-                          <node concept="3uibUv" id="2daneBOT1Cr" role="1tU5fm">
-                            <ref role="3uigEE" node="5X6ji59z5Fa" resolve="TraceTab" />
+                  <node concept="1DcWWT" id="5MK8bDyQWWb" role="3cqZAp">
+                    <node concept="3clFbS" id="5MK8bDyQWWe" role="2LFqv$">
+                      <node concept="3cpWs8" id="2daneBOT1Ck" role="3cqZAp">
+                        <node concept="3cpWsn" id="2daneBOT1Cl" role="3cpWs9">
+                          <property role="TrG5h" value="activationTrace" />
+                          <node concept="3uibUv" id="2daneBOT1Cm" role="1tU5fm">
+                            <ref role="3uigEE" node="7nPD14Nbbbe" resolve="TraceComponent" />
                           </node>
-                          <node concept="2OqwBi" id="2daneBOT1Cs" role="33vP2m">
-                            <node concept="37vLTw" id="2daneBOT1Ct" role="2Oq$k0">
-                              <ref role="3cqZAo" node="2daneBOT1Cl" resolve="activationTrace" />
-                            </node>
-                            <node concept="liA8E" id="2daneBOT1Cu" role="2OqNvi">
-                              <ref role="37wK5l" node="7nPD14Nb$fz" resolve="openTab" />
-                              <node concept="2OqwBi" id="2daneBOT1Cv" role="37wK5m">
-                                <node concept="37vLTw" id="2qsG4AwMhcG" role="2Oq$k0">
-                                  <ref role="3cqZAo" node="2qsG4AwMg10" resolve="traceEvents" />
-                                </node>
-                                <node concept="liA8E" id="2daneBOTNRu" role="2OqNvi">
-                                  <ref role="37wK5l" to="31yc:2daneBOTzUn" resolve="name" />
-                                </node>
-                              </node>
-                              <node concept="37vLTw" id="2qsG4AwMh$Q" role="37wK5m">
-                                <ref role="3cqZAo" node="2qsG4AwMg10" resolve="traceEvents" />
-                              </node>
+                          <node concept="2YIFZM" id="2daneBOT1Cn" role="33vP2m">
+                            <ref role="1Pybhc" node="7nPD14Nbbbe" resolve="TraceComponent" />
+                            <ref role="37wK5l" node="7nPD14Nboty" resolve="get" />
+                            <node concept="37vLTw" id="2qsG4AwM1YI" role="37wK5m">
+                              <ref role="3cqZAo" node="2qsG4AwM11s" resolve="mpsProject" />
                             </node>
                           </node>
                         </node>
                       </node>
-                      <node concept="3clFbH" id="2ceN1hCIpLA" role="3cqZAp" />
-                      <node concept="1QHqEK" id="6IQb_Rxsy5D" role="3cqZAp">
-                        <node concept="1QHqEC" id="6IQb_Rxsy5E" role="1QHqEI">
-                          <node concept="3clFbS" id="6IQb_Rxsy5F" role="1bW5cS">
-                            <node concept="3SKdUt" id="6IQb_Rxsy5M" role="3cqZAp">
-                              <node concept="1PaTwC" id="589APehYyhQ" role="3ndbpf">
-                                <node concept="3oM_SD" id="589APehYyhR" role="1PaTwD">
-                                  <property role="3oM_SC" value="actually" />
-                                </node>
-                                <node concept="3oM_SD" id="589APehYyhS" role="1PaTwD">
-                                  <property role="3oM_SC" value="show" />
-                                </node>
-                                <node concept="3oM_SD" id="589APehYyhT" role="1PaTwD">
-                                  <property role="3oM_SC" value="the" />
-                                </node>
-                                <node concept="3oM_SD" id="589APehYyhU" role="1PaTwD">
-                                  <property role="3oM_SC" value="trace" />
-                                </node>
+                      <node concept="3clFbJ" id="2daneBOUCgQ" role="3cqZAp">
+                        <node concept="3clFbS" id="2daneBOUCgS" role="3clFbx">
+                          <node concept="3cpWs8" id="2daneBOT1Cp" role="3cqZAp">
+                            <node concept="3cpWsn" id="2daneBOT1Cq" role="3cpWs9">
+                              <property role="TrG5h" value="openedTab" />
+                              <node concept="3uibUv" id="2daneBOT1Cr" role="1tU5fm">
+                                <ref role="3uigEE" node="5X6ji59z5Fa" resolve="TraceTab" />
                               </node>
-                            </node>
-                            <node concept="3clFbF" id="6IQb_Rxsy5T" role="3cqZAp">
-                              <node concept="2OqwBi" id="6IQb_Rxsy5U" role="3clFbG">
-                                <node concept="37vLTw" id="2daneBOUwlg" role="2Oq$k0">
-                                  <ref role="3cqZAo" node="2daneBOT1Cq" resolve="openedTab" />
+                              <node concept="2OqwBi" id="2daneBOT1Cs" role="33vP2m">
+                                <node concept="37vLTw" id="2daneBOT1Ct" role="2Oq$k0">
+                                  <ref role="3cqZAo" node="2daneBOT1Cl" resolve="activationTrace" />
                                 </node>
-                                <node concept="liA8E" id="6IQb_Rxsy5W" role="2OqNvi">
-                                  <ref role="37wK5l" node="5X6ji59xVZa" resolve="refreshActivation" />
+                                <node concept="liA8E" id="2daneBOT1Cu" role="2OqNvi">
+                                  <ref role="37wK5l" node="7nPD14Nb$fz" resolve="openTab" />
+                                  <node concept="2OqwBi" id="2daneBOT1Cv" role="37wK5m">
+                                    <node concept="37vLTw" id="5MK8bDyRpom" role="2Oq$k0">
+                                      <ref role="3cqZAo" node="5MK8bDyQWWf" resolve="traceEvents" />
+                                    </node>
+                                    <node concept="liA8E" id="5MK8bDyRqnA" role="2OqNvi">
+                                      <ref role="37wK5l" to="31yc:2daneBOTzUn" resolve="name" />
+                                    </node>
+                                  </node>
+                                  <node concept="37vLTw" id="5MK8bDyRpAW" role="37wK5m">
+                                    <ref role="3cqZAo" node="5MK8bDyQWWf" resolve="traceEvents" />
+                                  </node>
                                 </node>
                               </node>
                             </node>
                           </node>
-                        </node>
-                        <node concept="2OqwBi" id="6IQb_Rxsy6l" role="ukAjM">
-                          <node concept="37vLTw" id="2qsG4AwMhXg" role="2Oq$k0">
-                            <ref role="3cqZAo" node="2qsG4AwM11s" resolve="mpsProject" />
-                          </node>
-                          <node concept="liA8E" id="6IQb_Rxsy6n" role="2OqNvi">
-                            <ref role="37wK5l" to="z1c3:~Project.getRepository()" resolve="getRepository" />
-                          </node>
-                        </node>
-                      </node>
-                    </node>
-                    <node concept="3y3z36" id="2daneBOUDJ6" role="3clFbw">
-                      <node concept="10Nm6u" id="2daneBOUEku" role="3uHU7w" />
-                      <node concept="37vLTw" id="2daneBOUCRq" role="3uHU7B">
-                        <ref role="3cqZAo" node="2daneBOT1Cl" resolve="activationTrace" />
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-                    </node>
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-                    <node concept="3clFbS" id="47QDz5vdoDq" role="3clFbx">
-                      <node concept="3cpWs8" id="47QDz5vdnur" role="3cqZAp">
-                        <node concept="3cpWsn" id="47QDz5vdnus" role="3cpWs9">
-                          <property role="TrG5h" value="messageSink" />
-                          <node concept="3uibUv" id="47QDz5vdntR" role="1tU5fm">
-                            <ref role="3uigEE" to="31yc:4MaHsBDyVPn" resolve="MessageSink" />
-                          </node>
-                          <node concept="2OqwBi" id="47QDz5vdnut" role="33vP2m">
-                            <node concept="2YIFZM" id="47QDz5vdnuu" role="2Oq$k0">
-                              <ref role="37wK5l" to="31yc:4MaHsBDyI75" resolve="get" />
-                              <ref role="1Pybhc" to="31yc:4MaHsBDyFQ8" resolve="MessageSinkHost" />
-                              <node concept="37vLTw" id="47QDz5vdnuv" role="37wK5m">
+                          <node concept="3clFbH" id="2ceN1hCIpLA" role="3cqZAp" />
+                          <node concept="1QHqEK" id="6IQb_Rxsy5D" role="3cqZAp">
+                            <node concept="1QHqEC" id="6IQb_Rxsy5E" role="1QHqEI">
+                              <node concept="3clFbS" id="6IQb_Rxsy5F" role="1bW5cS">
+                                <node concept="3SKdUt" id="6IQb_Rxsy5M" role="3cqZAp">
+                                  <node concept="1PaTwC" id="589APehYyhQ" role="3ndbpf">
+                                    <node concept="3oM_SD" id="589APehYyhR" role="1PaTwD">
+                                      <property role="3oM_SC" value="actually" />
+                                    </node>
+                                    <node concept="3oM_SD" id="589APehYyhS" role="1PaTwD">
+                                      <property role="3oM_SC" value="show" />
+                                    </node>
+                                    <node concept="3oM_SD" id="589APehYyhT" role="1PaTwD">
+                                      <property role="3oM_SC" value="the" />
+                                    </node>
+                                    <node concept="3oM_SD" id="589APehYyhU" role="1PaTwD">
+                                      <property role="3oM_SC" value="trace" />
+                                    </node>
+                                  </node>
+                                </node>
+                                <node concept="3clFbF" id="6IQb_Rxsy5T" role="3cqZAp">
+                                  <node concept="2OqwBi" id="6IQb_Rxsy5U" role="3clFbG">
+                                    <node concept="37vLTw" id="2daneBOUwlg" role="2Oq$k0">
+                                      <ref role="3cqZAo" node="2daneBOT1Cq" resolve="openedTab" />
+                                    </node>
+                                    <node concept="liA8E" id="6IQb_Rxsy5W" role="2OqNvi">
+                                      <ref role="37wK5l" node="5X6ji59xVZa" resolve="refreshActivation" />
+                                    </node>
+                                  </node>
+                                </node>
+                              </node>
+                            </node>
+                            <node concept="2OqwBi" id="6IQb_Rxsy6l" role="ukAjM">
+                              <node concept="37vLTw" id="2qsG4AwMhXg" role="2Oq$k0">
                                 <ref role="3cqZAo" node="2qsG4AwM11s" resolve="mpsProject" />
                               </node>
-                            </node>
-                            <node concept="liA8E" id="47QDz5vdnuw" role="2OqNvi">
-                              <ref role="37wK5l" to="31yc:4MaHsBDyTr2" resolve="getMessageSink" />
-                              <node concept="2OqwBi" id="2EeqUFaesNT" role="37wK5m">
-                                <node concept="37vLTw" id="2EeqUFaesNU" role="2Oq$k0">
-                                  <ref role="3cqZAo" node="2qsG4AwMg10" resolve="traceEvents" />
-                                </node>
-                                <node concept="liA8E" id="2EeqUFaesNV" role="2OqNvi">
-                                  <ref role="37wK5l" to="31yc:2daneBOTzUn" resolve="name" />
-                                </node>
+                              <node concept="liA8E" id="6IQb_Rxsy6n" role="2OqNvi">
+                                <ref role="37wK5l" to="z1c3:~Project.getRepository()" resolve="getRepository" />
                               </node>
                             </node>
                           </node>
                         </node>
+                        <node concept="3y3z36" id="2daneBOUDJ6" role="3clFbw">
+                          <node concept="10Nm6u" id="2daneBOUEku" role="3uHU7w" />
+                          <node concept="37vLTw" id="2daneBOUCRq" role="3uHU7B">
+                            <ref role="3cqZAo" node="2daneBOT1Cl" resolve="activationTrace" />
+                          </node>
+                        </node>
                       </node>
-                      <node concept="3clFbH" id="47QDz5vdoDp" role="3cqZAp" />
-                      <node concept="1DcWWT" id="47QDz5vdqSf" role="3cqZAp">
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-                            <node concept="3cpWsn" id="2EeqUFae4WI" role="3cpWs9">
-                              <property role="TrG5h" value="mkind" />
-                              <node concept="3uibUv" id="2EeqUFae4qS" role="1tU5fm">
-                                <ref role="3uigEE" to="et5u:~MessageKind" resolve="MessageKind" />
-                              </node>
-                              <node concept="Rm8GO" id="2EeqUFae4WJ" role="33vP2m">
-                                <ref role="Rm8GQ" to="et5u:~MessageKind.INFORMATION" resolve="INFORMATION" />
-                                <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
-                              </node>
-                            </node>
-                          </node>
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-                            <node concept="3KbdKl" id="2EeqUFae4sZ" role="3KbHQx">
-                              <node concept="Rm8GO" id="2EeqUFae4GY" role="3Kbmr1">
-                                <ref role="Rm8GQ" to="2gg1:~MessageStatus.OK" resolve="OK" />
-                                <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
-                              </node>
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-                                      <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                      <node concept="3clFbH" id="47QDz5vdk5d" role="3cqZAp" />
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+                              <node concept="3cpWs8" id="47QDz5vdnur" role="3cqZAp">
+                                <node concept="3cpWsn" id="47QDz5vdnus" role="3cpWs9">
+                                  <property role="TrG5h" value="messageSink" />
+                                  <node concept="3uibUv" id="47QDz5vdntR" role="1tU5fm">
+                                    <ref role="3uigEE" to="31yc:4MaHsBDyVPn" resolve="MessageSink" />
+                                  </node>
+                                  <node concept="2OqwBi" id="47QDz5vdnut" role="33vP2m">
+                                    <node concept="2YIFZM" id="47QDz5vdnuu" role="2Oq$k0">
+                                      <ref role="37wK5l" to="31yc:4MaHsBDyI75" resolve="get" />
+                                      <ref role="1Pybhc" to="31yc:4MaHsBDyFQ8" resolve="MessageSinkHost" />
+                                      <node concept="37vLTw" id="47QDz5vdnuv" role="37wK5m">
+                                        <ref role="3cqZAo" node="2qsG4AwM11s" resolve="mpsProject" />
+                                      </node>
                                     </node>
-                                    <node concept="Rm8GO" id="2EeqUFae6vF" role="37vLTx">
-                                      <ref role="Rm8GQ" to="et5u:~MessageKind.INFORMATION" resolve="INFORMATION" />
-                                      <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                    <node concept="liA8E" id="47QDz5vdnuw" role="2OqNvi">
+                                      <ref role="37wK5l" to="31yc:4MaHsBDyTr2" resolve="getMessageSink" />
+                                      <node concept="2OqwBi" id="2EeqUFaesNT" role="37wK5m">
+                                        <node concept="37vLTw" id="5MK8bDyRpPy" role="2Oq$k0">
+                                          <ref role="3cqZAo" node="5MK8bDyQWWf" resolve="traceEvents" />
+                                        </node>
+                                        <node concept="liA8E" id="5MK8bDyRq9a" role="2OqNvi">
+                                          <ref role="37wK5l" to="31yc:2daneBOTzUn" resolve="name" />
+                                        </node>
+                                      </node>
                                     </node>
                                   </node>
                                 </node>
-                                <node concept="3zACq4" id="2EeqUFae6vB" role="3cqZAp" />
                               </node>
-                            </node>
-                            <node concept="3KbdKl" id="2EeqUFae4HD" role="3KbHQx">
-                              <node concept="Rm8GO" id="2EeqUFae4IX" role="3Kbmr1">
-                                <ref role="Rm8GQ" to="2gg1:~MessageStatus.WARNING" resolve="WARNING" />
-                                <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
-                              </node>
-                              <node concept="3clFbS" id="2EeqUFae4HF" role="3Kbo56">
-                                <node concept="3clFbF" id="2EeqUFae5_D" role="3cqZAp">
-                                  <node concept="37vLTI" id="2EeqUFae63N" role="3clFbG">
-                                    <node concept="37vLTw" id="2EeqUFae5_C" role="37vLTJ">
-                                      <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
-                                    </node>
-                                    <node concept="Rm8GO" id="2EeqUFae6E4" role="37vLTx">
-                                      <ref role="Rm8GQ" to="et5u:~MessageKind.WARNING" resolve="WARNING" />
-                                      <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                              <node concept="3clFbH" id="47QDz5vdoDp" role="3cqZAp" />
+                              <node concept="1DcWWT" id="47QDz5vdqSf" role="3cqZAp">
+                                <node concept="3clFbS" id="47QDz5vdqSi" role="2LFqv$">
+                                  <node concept="3clFbH" id="47QDz5vdrbL" role="3cqZAp" />
+                                  <node concept="3cpWs8" id="2EeqUFae4WH" role="3cqZAp">
+                                    <node concept="3cpWsn" id="2EeqUFae4WI" role="3cpWs9">
+                                      <property role="TrG5h" value="mkind" />
+                                      <node concept="3uibUv" id="2EeqUFae4qS" role="1tU5fm">
+                                        <ref role="3uigEE" to="et5u:~MessageKind" resolve="MessageKind" />
+                                      </node>
+                                      <node concept="Rm8GO" id="2EeqUFae4WJ" role="33vP2m">
+                                        <ref role="Rm8GQ" to="et5u:~MessageKind.INFORMATION" resolve="INFORMATION" />
+                                        <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                      </node>
                                     </node>
                                   </node>
-                                </node>
-                                <node concept="3zACq4" id="2EeqUFae6mr" role="3cqZAp" />
-                              </node>
-                            </node>
-                            <node concept="3KbdKl" id="2EeqUFae4JM" role="3KbHQx">
-                              <node concept="Rm8GO" id="2EeqUFae4Lj" role="3Kbmr1">
-                                <ref role="Rm8GQ" to="2gg1:~MessageStatus.ERROR" resolve="ERROR" />
-                                <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
-                              </node>
-                              <node concept="3clFbS" id="2EeqUFae4JO" role="3Kbo56">
-                                <node concept="3clFbF" id="2EeqUFae6HS" role="3cqZAp">
-                                  <node concept="37vLTI" id="2EeqUFae6HT" role="3clFbG">
-                                    <node concept="37vLTw" id="2EeqUFae6HU" role="37vLTJ">
-                                      <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                                  <node concept="3KaCP$" id="2EeqUFae41a" role="3cqZAp">
+                                    <node concept="3KbdKl" id="2EeqUFae4sZ" role="3KbHQx">
+                                      <node concept="Rm8GO" id="2EeqUFae4GY" role="3Kbmr1">
+                                        <ref role="Rm8GQ" to="2gg1:~MessageStatus.OK" resolve="OK" />
+                                        <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
+                                      </node>
+                                      <node concept="3clFbS" id="2EeqUFae4t1" role="3Kbo56">
+                                        <node concept="3clFbF" id="2EeqUFae6vC" role="3cqZAp">
+                                          <node concept="37vLTI" id="2EeqUFae6vD" role="3clFbG">
+                                            <node concept="37vLTw" id="2EeqUFae6vE" role="37vLTJ">
+                                              <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                                            </node>
+                                            <node concept="Rm8GO" id="2EeqUFae6vF" role="37vLTx">
+                                              <ref role="Rm8GQ" to="et5u:~MessageKind.INFORMATION" resolve="INFORMATION" />
+                                              <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3zACq4" id="2EeqUFae6vB" role="3cqZAp" />
+                                      </node>
                                     </node>
-                                    <node concept="Rm8GO" id="2EeqUFae6T7" role="37vLTx">
-                                      <ref role="Rm8GQ" to="et5u:~MessageKind.ERROR" resolve="ERROR" />
-                                      <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                    <node concept="3KbdKl" id="2EeqUFae4HD" role="3KbHQx">
+                                      <node concept="Rm8GO" id="2EeqUFae4IX" role="3Kbmr1">
+                                        <ref role="Rm8GQ" to="2gg1:~MessageStatus.WARNING" resolve="WARNING" />
+                                        <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
+                                      </node>
+                                      <node concept="3clFbS" id="2EeqUFae4HF" role="3Kbo56">
+                                        <node concept="3clFbF" id="2EeqUFae5_D" role="3cqZAp">
+                                          <node concept="37vLTI" id="2EeqUFae63N" role="3clFbG">
+                                            <node concept="37vLTw" id="2EeqUFae5_C" role="37vLTJ">
+                                              <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                                            </node>
+                                            <node concept="Rm8GO" id="2EeqUFae6E4" role="37vLTx">
+                                              <ref role="Rm8GQ" to="et5u:~MessageKind.WARNING" resolve="WARNING" />
+                                              <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3zACq4" id="2EeqUFae6mr" role="3cqZAp" />
+                                      </node>
                                     </node>
-                                  </node>
-                                </node>
-                                <node concept="3zACq4" id="2EeqUFae6HR" role="3cqZAp" />
-                              </node>
-                            </node>
-                            <node concept="2OqwBi" id="2EeqUFae2ZU" role="3KbGdf">
-                              <node concept="37vLTw" id="2EeqUFae2GY" role="2Oq$k0">
-                                <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
-                              </node>
-                              <node concept="liA8E" id="2EeqUFae3cW" role="2OqNvi">
-                                <ref role="37wK5l" to="d6hs:~ReportItem.getSeverity()" resolve="getSeverity" />
-                              </node>
-                            </node>
-                          </node>
-                          <node concept="3clFbH" id="2EeqUFae0Qm" role="3cqZAp" />
-                          <node concept="3clFbF" id="47QDz5vdmOz" role="3cqZAp">
-                            <node concept="2OqwBi" id="47QDz5vdnOT" role="3clFbG">
-                              <node concept="37vLTw" id="47QDz5vdnuy" role="2Oq$k0">
-                                <ref role="3cqZAo" node="47QDz5vdnus" resolve="messageSink" />
-                              </node>
-                              <node concept="liA8E" id="47QDz5vdnWj" role="2OqNvi">
-                                <ref role="37wK5l" to="31yc:4MaHsBDyVZB" resolve="add" />
-                                <node concept="2YIFZM" id="47QDz5vdrMo" role="37wK5m">
-                                  <ref role="1Pybhc" to="et5u:~Message" resolve="Message" />
-                                  <ref role="37wK5l" to="et5u:~Message.createMessage(jetbrains.mps.messages.MessageKind,java.lang.String,java.lang.String,java.lang.Object)" resolve="createMessage" />
-                                  <node concept="37vLTw" id="2EeqUFae4WK" role="37wK5m">
-                                    <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
-                                  </node>
-                                  <node concept="2OqwBi" id="47QDz5vdsQ7" role="37wK5m">
-                                    <node concept="liA8E" id="47QDz5vdtqz" role="2OqNvi">
-                                      <ref role="37wK5l" to="wyt6:~Class.getSimpleName()" resolve="getSimpleName" />
+                                    <node concept="3KbdKl" id="2EeqUFae4JM" role="3KbHQx">
+                                      <node concept="Rm8GO" id="2EeqUFae4Lj" role="3Kbmr1">
+                                        <ref role="Rm8GQ" to="2gg1:~MessageStatus.ERROR" resolve="ERROR" />
+                                        <ref role="1Px2BO" to="2gg1:~MessageStatus" resolve="MessageStatus" />
+                                      </node>
+                                      <node concept="3clFbS" id="2EeqUFae4JO" role="3Kbo56">
+                                        <node concept="3clFbF" id="2EeqUFae6HS" role="3cqZAp">
+                                          <node concept="37vLTI" id="2EeqUFae6HT" role="3clFbG">
+                                            <node concept="37vLTw" id="2EeqUFae6HU" role="37vLTJ">
+                                              <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                                            </node>
+                                            <node concept="Rm8GO" id="2EeqUFae6T7" role="37vLTx">
+                                              <ref role="Rm8GQ" to="et5u:~MessageKind.ERROR" resolve="ERROR" />
+                                              <ref role="1Px2BO" to="et5u:~MessageKind" resolve="MessageKind" />
+                                            </node>
+                                          </node>
+                                        </node>
+                                        <node concept="3zACq4" id="2EeqUFae6HR" role="3cqZAp" />
+                                      </node>
                                     </node>
-                                    <node concept="2OqwBi" id="2EeqUFaetjN" role="2Oq$k0">
-                                      <node concept="37vLTw" id="2EeqUFaesYY" role="2Oq$k0">
+                                    <node concept="2OqwBi" id="2EeqUFae2ZU" role="3KbGdf">
+                                      <node concept="37vLTw" id="2EeqUFae2GY" role="2Oq$k0">
                                         <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
                                       </node>
-                                      <node concept="liA8E" id="2EeqUFaetE8" role="2OqNvi">
-                                        <ref role="37wK5l" to="wyt6:~Object.getClass()" resolve="getClass" />
+                                      <node concept="liA8E" id="2EeqUFae3cW" role="2OqNvi">
+                                        <ref role="37wK5l" to="d6hs:~ReportItem.getSeverity()" resolve="getSeverity" />
                                       </node>
                                     </node>
                                   </node>
-                                  <node concept="2OqwBi" id="47QDz5vdube" role="37wK5m">
-                                    <node concept="37vLTw" id="47QDz5vdtT_" role="2Oq$k0">
-                                      <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
-                                    </node>
-                                    <node concept="liA8E" id="47QDz5vduq0" role="2OqNvi">
-                                      <ref role="37wK5l" to="d6hs:~ReportItem.getMessage()" resolve="getMessage" />
+                                  <node concept="3clFbH" id="2EeqUFae0Qm" role="3cqZAp" />
+                                  <node concept="3clFbF" id="47QDz5vdmOz" role="3cqZAp">
+                                    <node concept="2OqwBi" id="47QDz5vdnOT" role="3clFbG">
+                                      <node concept="37vLTw" id="47QDz5vdnuy" role="2Oq$k0">
+                                        <ref role="3cqZAo" node="47QDz5vdnus" resolve="messageSink" />
+                                      </node>
+                                      <node concept="liA8E" id="47QDz5vdnWj" role="2OqNvi">
+                                        <ref role="37wK5l" to="31yc:4MaHsBDyVZB" resolve="add" />
+                                        <node concept="2YIFZM" id="47QDz5vdrMo" role="37wK5m">
+                                          <ref role="1Pybhc" to="et5u:~Message" resolve="Message" />
+                                          <ref role="37wK5l" to="et5u:~Message.createMessage(jetbrains.mps.messages.MessageKind,java.lang.String,java.lang.String,java.lang.Object)" resolve="createMessage" />
+                                          <node concept="37vLTw" id="2EeqUFae4WK" role="37wK5m">
+                                            <ref role="3cqZAo" node="2EeqUFae4WI" resolve="mkind" />
+                                          </node>
+                                          <node concept="2OqwBi" id="47QDz5vdsQ7" role="37wK5m">
+                                            <node concept="liA8E" id="47QDz5vdtqz" role="2OqNvi">
+                                              <ref role="37wK5l" to="wyt6:~Class.getSimpleName()" resolve="getSimpleName" />
+                                            </node>
+                                            <node concept="2OqwBi" id="2EeqUFaetjN" role="2Oq$k0">
+                                              <node concept="37vLTw" id="2EeqUFaesYY" role="2Oq$k0">
+                                                <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
+                                              </node>
+                                              <node concept="liA8E" id="2EeqUFaetE8" role="2OqNvi">
+                                                <ref role="37wK5l" to="wyt6:~Object.getClass()" resolve="getClass" />
+                                              </node>
+                                            </node>
+                                          </node>
+                                          <node concept="2OqwBi" id="47QDz5vdube" role="37wK5m">
+                                            <node concept="37vLTw" id="47QDz5vdtT_" role="2Oq$k0">
+                                              <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
+                                            </node>
+                                            <node concept="liA8E" id="47QDz5vduq0" role="2OqNvi">
+                                              <ref role="37wK5l" to="d6hs:~ReportItem.getMessage()" resolve="getMessage" />
+                                            </node>
+                                          </node>
+                                          <node concept="37vLTw" id="47QDz5vduE9" role="37wK5m">
+                                            <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
+                                          </node>
+                                        </node>
+                                      </node>
                                     </node>
                                   </node>
-                                  <node concept="37vLTw" id="47QDz5vduE9" role="37wK5m">
-                                    <ref role="3cqZAo" node="47QDz5vdqSj" resolve="item" />
+                                  <node concept="3clFbH" id="47QDz5vdrbY" role="3cqZAp" />
+                                </node>
+                                <node concept="3cpWsn" id="47QDz5vdqSj" role="1Duv9x">
+                                  <property role="TrG5h" value="item" />
+                                  <node concept="3uibUv" id="47QDz5vdqSn" role="1tU5fm">
+                                    <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
                                   </node>
                                 </node>
+                                <node concept="37vLTw" id="5MK8bDyS756" role="1DdaDG">
+                                  <ref role="3cqZAo" node="5MK8bDyS4XE" resolve="itemsList" />
+                                </node>
                               </node>
                             </node>
-                          </node>
-                          <node concept="3clFbH" id="47QDz5vdrbY" role="3cqZAp" />
-                        </node>
-                        <node concept="3cpWsn" id="47QDz5vdqSj" role="1Duv9x">
-                          <property role="TrG5h" value="item" />
-                          <node concept="3uibUv" id="47QDz5vdqSn" role="1tU5fm">
-                            <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
+                            <node concept="2OqwBi" id="47QDz5vdq7n" role="3clFbw">
+                              <node concept="37vLTw" id="5MK8bDyS6OI" role="2Oq$k0">
+                                <ref role="3cqZAo" node="5MK8bDyS4XE" resolve="itemsList" />
+                              </node>
+                              <node concept="3GX2aA" id="47QDz5vdqwt" role="2OqNvi" />
+                            </node>
                           </node>
                         </node>
-                        <node concept="2OqwBi" id="47QDz5vdqSo" role="1DdaDG">
-                          <node concept="37vLTw" id="47QDz5vdqSp" role="2Oq$k0">
+                        <node concept="3cpWsn" id="5MK8bDyS4XE" role="1Duv9x">
+                          <property role="TrG5h" value="itemsList" />
+                          <node concept="_YKpA" id="5MK8bDyS4XI" role="1tU5fm">
+                            <node concept="3uibUv" id="5MK8bDyS4XJ" role="_ZDj9">
+                              <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
+                            </node>
+                          </node>
+                        </node>
+                        <node concept="2OqwBi" id="5MK8bDyS4XK" role="1DdaDG">
+                          <node concept="37vLTw" id="5MK8bDyS4XL" role="2Oq$k0">
                             <ref role="3cqZAo" node="2qsG4AwFsrf" resolve="traceObject" />
                           </node>
-                          <node concept="liA8E" id="47QDz5vdqSq" role="2OqNvi">
+                          <node concept="liA8E" id="5MK8bDyS4XM" role="2OqNvi">
                             <ref role="37wK5l" to="1yqb:47QDz5vcILI" resolve="reportItems" />
                           </node>
                         </node>
                       </node>
-                      <node concept="3clFbH" id="47QDz5vdqHm" role="3cqZAp" />
                     </node>
-                    <node concept="2OqwBi" id="47QDz5vdq7n" role="3clFbw">
-                      <node concept="2OqwBi" id="47QDz5vdplg" role="2Oq$k0">
-                        <node concept="37vLTw" id="47QDz5vdp12" role="2Oq$k0">
-                          <ref role="3cqZAo" node="2qsG4AwFsrf" resolve="traceObject" />
-                        </node>
-                        <node concept="liA8E" id="47QDz5vdpS0" role="2OqNvi">
-                          <ref role="37wK5l" to="1yqb:47QDz5vcILI" resolve="reportItems" />
-                        </node>
+                    <node concept="3cpWsn" id="5MK8bDyQWWf" role="1Duv9x">
+                      <property role="TrG5h" value="traceEvents" />
+                      <node concept="3uibUv" id="5MK8bDyQWWj" role="1tU5fm">
+                        <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
+                      </node>
+                    </node>
+                    <node concept="2OqwBi" id="5MK8bDyQWWk" role="1DdaDG">
+                      <node concept="37vLTw" id="5MK8bDyQWWl" role="2Oq$k0">
+                        <ref role="3cqZAo" node="2qsG4AwFsrf" resolve="traceObject" />
+                      </node>
+                      <node concept="liA8E" id="5MK8bDyQWWm" role="2OqNvi">
+                        <ref role="37wK5l" to="1yqb:2qsG4AwM6p0" resolve="getTraceEvents" />
                       </node>
-                      <node concept="3GX2aA" id="47QDz5vdqwt" role="2OqNvi" />
                     </node>
                   </node>
                 </node>
diff --git a/coderules/solutions/jetbrains.mps.coderules/models/service.mps b/coderules/solutions/jetbrains.mps.coderules/models/service.mps
index d01a8fb6..2c8109c6 100644
--- a/coderules/solutions/jetbrains.mps.coderules/models/service.mps
+++ b/coderules/solutions/jetbrains.mps.coderules/models/service.mps
@@ -398,6 +398,7 @@
       <concept id="1240325842691" name="jetbrains.mps.baseLanguage.collections.structure.AsSequenceOperation" flags="nn" index="39bAoz" />
       <concept id="1165525191778" name="jetbrains.mps.baseLanguage.collections.structure.GetFirstOperation" flags="nn" index="1uHKPH" />
       <concept id="1225727723840" name="jetbrains.mps.baseLanguage.collections.structure.FindFirstOperation" flags="nn" index="1z4cxt" />
+      <concept id="1176501494711" name="jetbrains.mps.baseLanguage.collections.structure.IsNotEmptyOperation" flags="nn" index="3GX2aA" />
       <concept id="1522217801069396578" name="jetbrains.mps.baseLanguage.collections.structure.FoldLeftOperation" flags="nn" index="1MD8d$">
         <child id="1522217801069421796" name="seed" index="1MDeny" />
       </concept>
@@ -6853,15 +6854,17 @@
       <node concept="3Tm1VV" id="1G9Y_Qvb2Oy" role="1B3o_S" />
       <node concept="3clFbS" id="1G9Y_Qvb2Oz" role="3clF47">
         <node concept="3clFbF" id="1G9Y_Qvb3Xk" role="3cqZAp">
-          <node concept="37vLTI" id="1G9Y_Qvb3Xm" role="3clFbG">
-            <node concept="2OqwBi" id="1G9Y_Qvb4On" role="37vLTJ">
+          <node concept="2OqwBi" id="5MK8bDyQUbC" role="3clFbG">
+            <node concept="2OqwBi" id="1G9Y_Qvb4On" role="2Oq$k0">
               <node concept="Xjq3P" id="1G9Y_Qvb4SA" role="2Oq$k0" />
               <node concept="2OwXpG" id="1G9Y_Qvb4Oq" role="2OqNvi">
                 <ref role="2Oxat5" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
               </node>
             </node>
-            <node concept="37vLTw" id="1G9Y_Qvb3Xq" role="37vLTx">
-              <ref role="3cqZAo" node="1G9Y_Qvb2PR" resolve="traceEvents" />
+            <node concept="TSZUe" id="5MK8bDyQUyG" role="2OqNvi">
+              <node concept="37vLTw" id="5MK8bDyQUNP" role="25WWJ7">
+                <ref role="3cqZAo" node="1G9Y_Qvb2PR" resolve="traceEvents" />
+              </node>
             </node>
           </node>
         </node>
@@ -6870,8 +6873,10 @@
     <node concept="2tJIrI" id="2qsG4AwM50i" role="jymVt" />
     <node concept="3clFb_" id="2qsG4AwM6p0" role="jymVt">
       <property role="TrG5h" value="getTraceEvents" />
-      <node concept="3uibUv" id="2qsG4AwM6tL" role="3clF45">
-        <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
+      <node concept="_YKpA" id="5MK8bDyQMKu" role="3clF45">
+        <node concept="3uibUv" id="5MK8bDyQMKv" role="_ZDj9">
+          <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
+        </node>
       </node>
       <node concept="3Tm1VV" id="2qsG4AwM6p3" role="1B3o_S" />
       <node concept="3clFbS" id="2qsG4AwM6p4" role="3clF47">
@@ -6889,23 +6894,25 @@
       <node concept="3Tm1VV" id="47QDz5vctaU" role="1B3o_S" />
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                 <ref role="2Oxat5" node="47QDz5vc__s" resolve="reportItems" />
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+                  <node concept="3uibUv" id="47QDz5vcDc2" role="HW$YZ">
+                    <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
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+                    <ref role="3cqZAo" node="47QDz5vczh2" resolve="items" />
+                  </node>
+                </node>
+              </node>
+            </node>
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@@ -6922,8 +6929,10 @@
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       <property role="TrG5h" value="reportItems" />
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-        <node concept="3uibUv" id="47QDz5vcOf7" role="A3Ik2">
-          <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
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+          <node concept="3uibUv" id="5MK8bDyS1Do" role="_ZDj9">
+            <ref role="3uigEE" to="d6hs:~ReportItem" resolve="ReportItem" />
+          </node>
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       <node concept="3Tm1VV" id="47QDz5vcILL" role="1B3o_S" />
@@ -6955,8 +6964,11 @@
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-                        <node concept="37vLTw" id="2mhJggjzqo4" role="2Oq$k0">
-                          <ref role="3cqZAo" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
+                        <node concept="2OqwBi" id="5MK8bDyQRV3" role="2Oq$k0">
+                          <node concept="37vLTw" id="2mhJggjzqo4" role="2Oq$k0">
+                            <ref role="3cqZAo" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
+                          </node>
+                          <node concept="1uHKPH" id="5MK8bDyQSiP" role="2OqNvi" />
                         </node>
                         <node concept="liA8E" id="2mhJggjzqo5" role="2OqNvi">
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@@ -6971,8 +6983,11 @@
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-                      <ref role="3cqZAo" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
+                    <node concept="2OqwBi" id="5MK8bDyQSXj" role="2Oq$k0">
+                      <node concept="37vLTw" id="2mhJggjzqo9" role="2Oq$k0">
+                        <ref role="3cqZAo" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
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                     <node concept="liA8E" id="2mhJggjzqoa" role="2OqNvi">
                       <ref role="37wK5l" to="31yc:2mhJggjyLXN" resolve="lastEventId" />
@@ -6983,11 +6998,11 @@
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-            <node concept="37vLTw" id="2mhJggjzpV9" role="3uHU7B">
+          <node concept="2OqwBi" id="5MK8bDyQQ6u" role="3clFbw">
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               <ref role="3cqZAo" node="1G9Y_Qvb3Xg" resolve="traceEvents" />
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         <node concept="3clFbF" id="2mhJggjzqHo" role="3cqZAp">
@@ -7004,16 +7019,36 @@
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       <property role="TrG5h" value="traceEvents" />
       <node concept="3Tm6S6" id="1G9Y_Qvb3Xh" role="1B3o_S" />
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-        <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
+      <node concept="_YKpA" id="5MK8bDyQN8i" role="1tU5fm">
+        <node concept="3uibUv" id="5MK8bDyQN8j" role="_ZDj9">
+          <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
+        </node>
+      </node>
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+        <node concept="Tc6Ow" id="5MK8bDyQOc9" role="2ShVmc">
+          <node concept="3uibUv" id="5MK8bDyQOca" role="HW$YZ">
+            <ref role="3uigEE" to="31yc:2ceN1hCYUQN" resolve="TraceEvents" />
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+        </node>
       </node>
     </node>
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