diff --git a/languages/jetbrains.mps.logic/generator/template/main@generator.mps b/languages/jetbrains.mps.logic/generator/template/main@generator.mps
index 15c1a2a3..243639b1 100644
--- a/languages/jetbrains.mps.logic/generator/template/main@generator.mps
+++ b/languages/jetbrains.mps.logic/generator/template/main@generator.mps
@@ -550,9 +550,9 @@
         </node>
       </node>
       <node role="ruleConsequence" roleId="tpf8.1169672767469" type="tpf8.InlineTemplate_RuleConsequence" typeId="tpf8.1177093525992" id="1503029990112826" nodeInfo="ng">
-        <node role="templateNode" roleId="tpf8.1177093586806" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="1503029990112827" nodeInfo="nn">
-          <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.2154023965590888595" resolveInfo="AstBuilder" />
-          <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.7571593955704830255" resolveInfo="valueList" />
+        <node role="templateNode" roleId="tpf8.1177093586806" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="6270176708454008595" nodeInfo="nn">
+          <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.6270176708454008542" resolveInfo="valueList" />
+          <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.6626732309150452506" resolveInfo="Builder" />
           <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StringLiteral" typeId="tpee.1070475926800" id="1503029990112828" nodeInfo="nn">
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diff --git a/languages/jetbrains.mps.logic/sandbox/models/jetbrains/mps/logic/sandbox.mps b/languages/jetbrains.mps.logic/sandbox/models/jetbrains/mps/logic/sandbox.mps
index 7e493d8c..c829a142 100644
--- a/languages/jetbrains.mps.logic/sandbox/models/jetbrains/mps/logic/sandbox.mps
+++ b/languages/jetbrains.mps.logic/sandbox/models/jetbrains/mps/logic/sandbox.mps
@@ -788,7 +788,7 @@
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="7571593955704290664" nodeInfo="nr">
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             <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="7571593955704290659" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.7571593955703157909" resolveInfo="ListBranch" />
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908421477892" resolveInfo="ListBranch" />
               <node role="parameter" roleId="tpee.1109201940907" type="tpee.WildCardType" typeId="tpee.1171903607971" id="7571593955704304642" nodeInfo="in" />
             </node>
             <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="7571593955704290665" nodeInfo="nn">
@@ -818,12 +818,12 @@
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="7571593955704749113" nodeInfo="nr">
             <property name="name" nameId="tpck.1169194664001" value="valuesList" />
             <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="7571593955704749114" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.7571593955703157909" resolveInfo="ListBranch" />
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908421477892" resolveInfo="ListBranch" />
               <node role="parameter" roleId="tpee.1109201940907" type="tpee.WildCardType" typeId="tpee.1171903607971" id="7571593955704749115" nodeInfo="in" />
             </node>
-            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="7571593955705062044" nodeInfo="nn">
-              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.7571593955704830255" resolveInfo="valueList" />
-              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.2154023965590888595" resolveInfo="AstBuilder" />
+            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="6270176708454008594" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.6270176708454008542" resolveInfo="valueList" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.6626732309150452506" resolveInfo="Builder" />
               <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StringLiteral" typeId="tpee.1070475926800" id="7571593955705062045" nodeInfo="nn">
                 <property name="value" nameId="tpee.1070475926801" value="valuesList" />
               </node>
@@ -840,12 +840,12 @@
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="7571593955705112866" nodeInfo="nr">
             <property name="name" nameId="tpck.1169194664001" value="varList" />
             <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="7571593955705112867" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.7571593955703157909" resolveInfo="ListBranch" />
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908421477892" resolveInfo="ListBranch" />
               <node role="parameter" roleId="tpee.1109201940907" type="tpee.WildCardType" typeId="tpee.1171903607971" id="7571593955705112868" nodeInfo="in" />
             </node>
-            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="7571593955705112869" nodeInfo="nn">
-              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.7571593955704830255" resolveInfo="valueList" />
-              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.2154023965590888595" resolveInfo="AstBuilder" />
+            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="6270176708454008593" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.6270176708454008542" resolveInfo="valueList" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.6626732309150452506" resolveInfo="Builder" />
               <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StringLiteral" typeId="tpee.1070475926800" id="7571593955705112870" nodeInfo="nn">
                 <property name="value" nameId="tpee.1070475926801" value="varList" />
               </node>
@@ -1907,15 +1907,15 @@
         <node role="statement" roleId="tpee.1068581517665" type="tpee.LocalVariableDeclarationStatement" typeId="tpee.1068581242864" id="4744400670981314232" nodeInfo="nn">
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4744400670981314233" nodeInfo="nr">
             <property name="name" nameId="tpck.1169194664001" value="walker" />
-            <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4310122986194278475" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.4310122986194154418" resolveInfo="AstWalk.Walker" />
+            <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908422161068" nodeInfo="in">
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4310122986193244369" resolveInfo="TreeWalk.Walker" />
             </node>
             <node role="initializer" roleId="tpee.1068431790190" type="tpee.GenericNewExpression" typeId="tpee.1145552977093" id="4744400670981314234" nodeInfo="nn">
               <node role="creator" roleId="tpee.1145553007750" type="tpee.AnonymousClassCreator" typeId="tpee.1182160077978" id="4744400670981314235" nodeInfo="nn">
                 <node role="cls" roleId="tpee.1182160096073" type="tpee.AnonymousClass" typeId="tpee.1170345865475" id="4744400670981314236" nodeInfo="ig">
                   <property name="nonStatic" nameId="tpee.521412098689998745" value="true" />
                   <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="e2lb.~Object%d&lt;init&gt;()" resolveInfo="Object" />
-                  <link role="classifier" roleId="tpee.1170346070688" targetNodeId="tqye.4310122986194154418" resolveInfo="AstWalk.Walker" />
+                  <link role="classifier" roleId="tpee.1170346070688" targetNodeId="ie8e.4310122986193244369" resolveInfo="TreeWalk.Walker" />
                   <node role="visibility" roleId="tpee.1178549979242" type="tpee.PublicVisibility" typeId="tpee.1146644602865" id="4744400670981314237" nodeInfo="nn" />
                   <node role="member" roleId="tpee.5375687026011219971" type="tpee.InstanceMethodDeclaration" typeId="tpee.1068580123165" id="4410561908420878157" nodeInfo="igu">
                     <property name="isAbstract" nameId="tpee.1178608670077" value="false" />
@@ -2117,7 +2117,7 @@
                     <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908420920302" nodeInfo="ir">
                       <property name="name" nameId="tpck.1169194664001" value="listb" />
                       <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908420920303" nodeInfo="in">
-                        <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.7571593955703157909" resolveInfo="ListBranch" />
+                        <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908421477892" resolveInfo="ListBranch" />
                         <node role="parameter" roleId="tpee.1109201940907" type="tpee.TypeVariableReference" typeId="tpee.1109283449304" id="4410561908420920304" nodeInfo="in">
                           <link role="typeVariableDeclaration" roleId="tpee.1109283546497" targetNodeId="4410561908420920310" resolveInfo="T" />
                         </node>
@@ -2198,7 +2198,7 @@
           <node role="expression" roleId="tpee.1068580123156" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4744400670981316584" nodeInfo="nn">
             <node role="operand" roleId="tpee.1197027771414" type="tpee.GenericNewExpression" typeId="tpee.1145552977093" id="4744400670981212771" nodeInfo="nn">
               <node role="creator" roleId="tpee.1145553007750" type="tpee.ClassCreator" typeId="tpee.1212685548494" id="4744400670981213654" nodeInfo="nn">
-                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986194157961" resolveInfo="AstWalk" />
+                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4744400670979469750" resolveInfo="TreeWalk" />
                 <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4744400670981316436" nodeInfo="nn">
                   <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4744400670981314233" resolveInfo="walker" />
                 </node>
@@ -2222,7 +2222,7 @@
           <node role="expression" roleId="tpee.1068580123156" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4744400670983059355" nodeInfo="nn">
             <node role="operand" roleId="tpee.1197027771414" type="tpee.GenericNewExpression" typeId="tpee.1145552977093" id="4744400670983059356" nodeInfo="nn">
               <node role="creator" roleId="tpee.1145553007750" type="tpee.ClassCreator" typeId="tpee.1212685548494" id="4744400670983059357" nodeInfo="nn">
-                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986194157961" resolveInfo="AstWalk" />
+                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4744400670979469750" resolveInfo="TreeWalk" />
                 <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4744400670983059358" nodeInfo="nn">
                   <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4744400670981314233" resolveInfo="walker" />
                 </node>
@@ -2394,11 +2394,11 @@
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4310122986196898064" nodeInfo="nr">
             <property name="name" nameId="tpck.1169194664001" value="find3" />
             <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4310122986196898058" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.4310122986193792061" resolveInfo="AstFinders.IListFinder" />
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908422209301" resolveInfo="Finders.IListFinder" />
             </node>
-            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4310122986196898065" nodeInfo="nn">
-              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986194200973" resolveInfo="findList" />
-              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.4310122986193991337" resolveInfo="AstFinders" />
+            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908422725723" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4410561908422725697" resolveInfo="findList" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.4310122986191731719" resolveInfo="Finders" />
               <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4155268531087987148" nodeInfo="nn">
                 <node role="operand" roleId="tpee.1197027771414" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4310122986196898066" nodeInfo="nn">
                   <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4744400670981211979" resolveInfo="list" />
@@ -2430,7 +2430,7 @@
                     <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4310122986196898064" resolveInfo="find3" />
                   </node>
                   <node role="operation" roleId="tpee.1197027833540" type="tpee.InstanceMethodCallOperation" typeId="tpee.1202948039474" id="4310122986196945254" nodeInfo="nn">
-                    <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986193792066" resolveInfo="result" />
+                    <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4410561908422209302" resolveInfo="result" />
                   </node>
                 </node>
                 <node role="leftExpression" roleId="tpee.1081773367580" type="tpee.PlusExpression" typeId="tpee.1068581242875" id="4310122986196924644" nodeInfo="nn">
@@ -2460,11 +2460,11 @@
           <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4310122986197227855" nodeInfo="nr">
             <property name="name" nameId="tpck.1169194664001" value="find4" />
             <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4310122986197227856" nodeInfo="in">
-              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="tqye.4310122986193792061" resolveInfo="AstFinders.IListFinder" />
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908422209301" resolveInfo="Finders.IListFinder" />
             </node>
-            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4310122986197227857" nodeInfo="nn">
-              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986194200973" resolveInfo="findList" />
-              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.4310122986193991337" resolveInfo="AstFinders" />
+            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908422725722" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4410561908422725697" resolveInfo="findList" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.4310122986191731719" resolveInfo="Finders" />
               <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4155268531087984522" nodeInfo="nn">
                 <node role="operand" roleId="tpee.1197027771414" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4310122986197233015" nodeInfo="nn">
                   <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4744400670983058525" resolveInfo="fun" />
@@ -2496,7 +2496,7 @@
                     <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4310122986197227855" resolveInfo="find4" />
                   </node>
                   <node role="operation" roleId="tpee.1197027833540" type="tpee.InstanceMethodCallOperation" typeId="tpee.1202948039474" id="4310122986197227846" nodeInfo="nn">
-                    <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4310122986193792066" resolveInfo="result" />
+                    <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4410561908422209302" resolveInfo="result" />
                   </node>
                 </node>
                 <node role="leftExpression" roleId="tpee.1081773367580" type="tpee.PlusExpression" typeId="tpee.1068581242875" id="4310122986197227847" nodeInfo="nn">
@@ -2882,8 +2882,8 @@
               <link role="classifier" roleId="tpee.1107535924139" targetNodeId="ie8e.4410561908414143737" resolveInfo="ITreePart.Mapper" />
             </node>
             <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908416894659" nodeInfo="nn">
-              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="tqye.4410561908415559522" resolveInfo="AstMappers" />
-              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="tqye.4410561908416489411" resolveInfo="childrenMapper" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="ie8e.4410561908414122145" resolveInfo="Mappers" />
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="ie8e.4410561908416489411" resolveInfo="childrenMapper" />
               <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StringLiteral" typeId="tpee.1070475926800" id="4410561908416894660" nodeInfo="nn">
                 <property name="value" nameId="tpee.1070475926801" value="node" />
               </node>
diff --git a/solutions/jetbrains.mps.unification.tree/jetbrains.mps.unification.tree.msd b/solutions/jetbrains.mps.unification.tree/jetbrains.mps.unification.tree.msd
index fda1b01c..bcb1a6e0 100644
--- a/solutions/jetbrains.mps.unification.tree/jetbrains.mps.unification.tree.msd
+++ b/solutions/jetbrains.mps.unification.tree/jetbrains.mps.unification.tree.msd
@@ -16,6 +16,7 @@
   </dependencies>
   <usedLanguages>
     <usedLanguage>fd392034-7849-419d-9071-12563d152375(jetbrains.mps.baseLanguage.closures)</usedLanguage>
+    <usedLanguage>f2801650-65d5-424e-bb1b-463a8781b786(jetbrains.mps.baseLanguage.javadoc)</usedLanguage>
   </usedLanguages>
   <usedDevKits>
     <usedDevKit>fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)</usedDevKit>
diff --git a/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/ast.mps b/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/ast.mps
index aafbc267..a5a83d78 100644
--- a/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/ast.mps
+++ b/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/ast.mps
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <model modelUID="r:a96ed64c-59f1-465b-8d59-dbd0e8856971(jetbrains.mps.unification.ast)">
   <persistence version="8" />
+  <language namespace="f2801650-65d5-424e-bb1b-463a8781b786(jetbrains.mps.baseLanguage.javadoc)" />
   <devkit namespace="fbc25dd2-5da4-483a-8b19-70928e1b62d7(jetbrains.mps.devkit.general-purpose)" />
   <import index="ie8e" modelUID="r:ab2605ab-b4bc-4e80-a8ca-19a4a8465c01(jetbrains.mps.unification.tree)" version="-1" />
   <import index="jfki" modelUID="f:java_stub#7526e0cf-1ce7-46f8-a555-9eca1e06c23b#jetbrains.mps.unification(jetbrains.mps.unification@java_stub)" version="-1" />
@@ -8,10 +9,10 @@
   <import index="k7g3" modelUID="f:java_stub#6354ebe7-c22a-4a0f-ac54-50b52ab9b065#java.util(JDK/java.util@java_stub)" version="-1" />
   <import index="tpee" modelUID="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" version="5" implicit="yes" />
   <import index="tpck" modelUID="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" version="0" implicit="yes" />
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-  <import index="tp2q" modelUID="r:00000000-0000-4000-0000-011c8959032e(jetbrains.mps.baseLanguage.collections.structure)" version="7" implicit="yes" />
+  <import index="m373" modelUID="r:4095af4f-a097-4799-aaa9-03df087ddfa6(jetbrains.mps.baseLanguage.javadoc.structure)" version="5" implicit="yes" />
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@@ -139,3500 +140,20 @@
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     </node>
   </root>
 </model>
diff --git a/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/tree.mps b/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/tree.mps
index b40bda95..163e2aff 100644
--- a/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/tree.mps
+++ b/solutions/jetbrains.mps.unification.tree/models/jetbrains/mps/unification/tree.mps
@@ -8,6 +8,7 @@
   <import index="jfki" modelUID="f:java_stub#7526e0cf-1ce7-46f8-a555-9eca1e06c23b#jetbrains.mps.unification(jetbrains.mps.unification@java_stub)" version="-1" />
   <import index="k7g3" modelUID="f:java_stub#6354ebe7-c22a-4a0f-ac54-50b52ab9b065#java.util(JDK/java.util@java_stub)" version="-1" />
   <import index="e2lb" modelUID="f:java_stub#6354ebe7-c22a-4a0f-ac54-50b52ab9b065#java.lang(JDK/java.lang@java_stub)" version="-1" />
+  <import index="tqye" modelUID="r:a96ed64c-59f1-465b-8d59-dbd0e8856971(jetbrains.mps.unification.ast)" version="-1" />
   <import index="tpee" modelUID="r:00000000-0000-4000-0000-011c895902ca(jetbrains.mps.baseLanguage.structure)" version="5" implicit="yes" />
   <import index="tpck" modelUID="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" version="0" implicit="yes" />
   <import index="tp2q" modelUID="r:00000000-0000-4000-0000-011c8959032e(jetbrains.mps.baseLanguage.collections.structure)" version="7" implicit="yes" />
@@ -1697,7 +1698,7 @@
   </root>
   <root type="tpee.ClassConcept" typeId="tpee.1068390468198" id="6626732309150452506" nodeInfo="ig">
     <property name="name" nameId="tpck.1169194664001" value="Builder" />
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+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.PlaceholderMember" typeId="tpee.1465982738277781862" id="6270176708454152417" nodeInfo="ngu" />
     <node role="member" roleId="tpee.5375687026011219971" type="tpee.StaticMethodDeclaration" typeId="tpee.1081236700938" id="6626732309150638723" nodeInfo="igu">
       <property name="name" nameId="tpck.1169194664001" value="tree" />
       <property name="isSynchronized" nameId="tpee.4276006055363816570" value="false" />
@@ -2020,6 +2021,262 @@
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     </node>
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+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.StaticMethodDeclaration" typeId="tpee.1081236700938" id="6270176708454008542" nodeInfo="igu">
+      <property name="name" nameId="tpck.1169194664001" value="valueList" />
+      <property name="isSynchronized" nameId="tpee.4276006055363816570" value="false" />
+      <property name="isFinal" nameId="tpee.1181808852946" value="false" />
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="6270176708454008543" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="symbol" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="6270176708454008544" nodeInfo="in">
+          <link role="classifier" roleId="tpee.1107535924139" targetNodeId="e2lb.~Object" resolveInfo="Object" />
+        </node>
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+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="6270176708454008545" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="values" />
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+          <node role="bound" roleId="tpee.1214996921760" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908422995740" nodeInfo="in">
+            <link role="classifier" roleId="tpee.1107535924139" targetNodeId="1357303818382341941" resolveInfo="ITreePart" />
+            <node role="parameter" roleId="tpee.1109201940907" type="tpee.WildCardType" typeId="tpee.1171903607971" id="4410561908422995741" nodeInfo="in" />
+          </node>
+        </node>
+        <node role="body" roleId="tpee.1068580123135" type="tpee.StatementList" typeId="tpee.1068580123136" id="4410561908422995742" nodeInfo="sn">
+          <node role="statement" roleId="tpee.1068581517665" type="tpee.SingleLineComment" typeId="tpee.6329021646629104954" id="4410561908423017781" nodeInfo="nn">
+            <node role="commentPart" roleId="tpee.6329021646629175155" type="tpee.TextCommentPart" typeId="tpee.6329021646629104957" id="4410561908423018495" nodeInfo="nn">
+              <property name="text" nameId="tpee.6329021646629104958" value="TODO check this out" />
+            </node>
+          </node>
+          <node role="statement" roleId="tpee.1068581517665" type="tpee.ExpressionStatement" typeId="tpee.1068580123155" id="4410561908423013259" nodeInfo="nn">
+            <node role="expression" roleId="tpee.1068580123156" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4410561908423014408" nodeInfo="nn">
+              <node role="operand" roleId="tpee.1197027771414" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908423013258" nodeInfo="nn">
+                <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908422995736" resolveInfo="list" />
+              </node>
+              <node role="operation" roleId="tpee.1197027833540" type="tpee.InstanceMethodCallOperation" typeId="tpee.1202948039474" id="4410561908423015701" nodeInfo="nn">
+                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="4410561908421478210" resolveInfo="mapRecursively" />
+                <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.ThisExpression" typeId="tpee.1070475354124" id="4410561908423016448" nodeInfo="nn" />
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node role="member" roleId="tpee.5375687026011219971" type="tpee.PlaceholderMember" typeId="tpee.1465982738277781862" id="4410561908423000628" nodeInfo="ngu" />
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         <property name="isAbstract" nameId="tpee.1178608670077" value="false" />
         <property name="name" nameId="tpck.1169194664001" value="visitValues" />
@@ -5617,5 +6805,2170 @@
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     <node role="visibility" roleId="tpee.1178549979242" type="tpee.PublicVisibility" typeId="tpee.1146644602865" id="4410561908414122146" nodeInfo="nn" />
   </root>
+  <root type="tpee.ClassConcept" typeId="tpee.1068390468198" id="4410561908421477892" nodeInfo="ig">
+    <property name="name" nameId="tpck.1169194664001" value="ListBranch" />
+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.PlaceholderMember" typeId="tpee.1465982738277781862" id="4410561908421477909" nodeInfo="ngu" />
+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.StaticMethodDeclaration" typeId="tpee.1081236700938" id="4410561908421477910" nodeInfo="igu">
+      <property name="name" nameId="tpck.1169194664001" value="create" />
+      <property name="isSynchronized" nameId="tpee.4276006055363816570" value="false" />
+      <property name="isFinal" nameId="tpee.1181808852946" value="false" />
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908421477911" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="symbol" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477912" nodeInfo="in">
+          <link role="classifier" roleId="tpee.1107535924139" targetNodeId="e2lb.~Object" resolveInfo="Object" />
+        </node>
+      </node>
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908421477913" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="elements" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.VariableArityType" typeId="tpee.1219920932475" id="4410561908421477914" nodeInfo="in">
+          <node role="componentType" roleId="tpee.1219921048460" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477915" nodeInfo="in">
+            <link role="classifier" roleId="tpee.1107535924139" targetNodeId="1357303818382341941" resolveInfo="ITreePart" />
+          </node>
+        </node>
+      </node>
+      <node role="body" roleId="tpee.1068580123135" type="tpee.StatementList" typeId="tpee.1068580123136" id="4410561908421477916" nodeInfo="sn">
+        <node role="statement" roleId="tpee.1068581517665" type="tpee.LocalVariableDeclarationStatement" typeId="tpee.1068581242864" id="4410561908421477917" nodeInfo="nn">
+          <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4410561908421477918" nodeInfo="nr">
+            <property name="name" nameId="tpck.1169194664001" value="path" />
+            <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477919" nodeInfo="in">
+              <link role="classifier" roleId="tpee.1107535924139" targetNodeId="2154023965589875834" resolveInfo="Path" />
+            </node>
+            <node role="initializer" roleId="tpee.1068431790190" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908421477920" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="2154023965589928561" resolveInfo="create" />
+              <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="2154023965589875834" resolveInfo="Path" />
+              <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477921" nodeInfo="nn">
+                <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477911" resolveInfo="symbol" />
+              </node>
+            </node>
+          </node>
+        </node>
+        <node role="statement" roleId="tpee.1068581517665" type="tpee.ExpressionStatement" typeId="tpee.1068580123155" id="4410561908421477922" nodeInfo="nn">
+          <node role="expression" roleId="tpee.1068580123156" type="tpee.GenericNewExpression" typeId="tpee.1145552977093" id="4410561908421477923" nodeInfo="nn">
+            <node role="creator" roleId="tpee.1145553007750" type="tpee.ClassCreator" typeId="tpee.1212685548494" id="4410561908421477924" nodeInfo="nn">
+              <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="4410561908421478119" resolveInfo="ListBranch" />
+              <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477925" nodeInfo="nn">
+                <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477918" resolveInfo="path" />
+              </node>
+              <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908421477926" nodeInfo="nn">
+                <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="4410561908421477937" resolveInfo="createList" />
+                <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="4410561908421477892" resolveInfo="ListBranch" />
+                <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477927" nodeInfo="nn">
+                  <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477918" resolveInfo="path" />
+                </node>
+                <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477928" nodeInfo="nn">
+                  <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477913" resolveInfo="elements" />
+                </node>
+                <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.IntegerConstant" typeId="tpee.1068580320020" id="4410561908421477929" nodeInfo="nn">
+                  <property name="value" nameId="tpee.1068580320021" value="0" />
+                </node>
+              </node>
+            </node>
+          </node>
+        </node>
+      </node>
+      <node role="visibility" roleId="tpee.1178549979242" type="tpee.PublicVisibility" typeId="tpee.1146644602865" id="4410561908421477930" nodeInfo="nn" />
+      <node role="returnType" roleId="tpee.1068580123133" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477931" nodeInfo="in">
+        <link role="classifier" roleId="tpee.1107535924139" targetNodeId="4410561908421477892" resolveInfo="ListBranch" />
+        <node role="parameter" roleId="tpee.1109201940907" type="tpee.TypeVariableReference" typeId="tpee.1109283449304" id="4410561908421477932" nodeInfo="in">
+          <link role="typeVariableDeclaration" roleId="tpee.1109283546497" targetNodeId="4410561908421477933" resolveInfo="T" />
+        </node>
+      </node>
+      <node role="typeVariableDeclaration" roleId="tpee.1109279881614" type="tpee.TypeVariableDeclaration" typeId="tpee.1109279763828" id="4410561908421477933" nodeInfo="ng">
+        <property name="name" nameId="tpck.1169194664001" value="T" />
+        <node role="bound" roleId="tpee.1214996921760" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477934" nodeInfo="in">
+          <link role="classifier" roleId="tpee.1107535924139" targetNodeId="1357303818382341941" resolveInfo="ITreePart" />
+          <node role="parameter" roleId="tpee.1109201940907" type="tpee.WildCardType" typeId="tpee.1171903607971" id="4410561908421477935" nodeInfo="in" />
+        </node>
+      </node>
+    </node>
+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.PlaceholderMember" typeId="tpee.1465982738277781862" id="4410561908421477936" nodeInfo="ngu" />
+    <node role="member" roleId="tpee.5375687026011219971" type="tpee.StaticMethodDeclaration" typeId="tpee.1081236700938" id="4410561908421477937" nodeInfo="igu">
+      <property name="name" nameId="tpck.1169194664001" value="createList" />
+      <property name="isSynchronized" nameId="tpee.4276006055363816570" value="false" />
+      <property name="isFinal" nameId="tpee.1181808852946" value="false" />
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908421477938" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="parentPath" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477939" nodeInfo="in">
+          <link role="classifier" roleId="tpee.1107535924139" targetNodeId="2154023965589875834" resolveInfo="Path" />
+        </node>
+      </node>
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908421477940" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="elements" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.ArrayType" typeId="tpee.1070534760951" id="4410561908421477941" nodeInfo="in">
+          <node role="componentType" roleId="tpee.1070534760952" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477942" nodeInfo="in">
+            <link role="classifier" roleId="tpee.1107535924139" targetNodeId="1357303818382341941" resolveInfo="ITreePart" />
+          </node>
+        </node>
+      </node>
+      <node role="parameter" roleId="tpee.1068580123134" type="tpee.ParameterDeclaration" typeId="tpee.1068498886292" id="4410561908421477943" nodeInfo="ir">
+        <property name="name" nameId="tpck.1169194664001" value="headIdx" />
+        <node role="type" roleId="tpee.5680397130376446158" type="tpee.IntegerType" typeId="tpee.1070534370425" id="4410561908421477944" nodeInfo="in" />
+      </node>
+      <node role="body" roleId="tpee.1068580123135" type="tpee.StatementList" typeId="tpee.1068580123136" id="4410561908421477945" nodeInfo="sn">
+        <node role="statement" roleId="tpee.1068581517665" type="tpee.IfStatement" typeId="tpee.1068580123159" id="4410561908421477946" nodeInfo="nn">
+          <node role="ifTrue" roleId="tpee.1068580123161" type="tpee.StatementList" typeId="tpee.1068580123136" id="4410561908421477947" nodeInfo="sn">
+            <node role="statement" roleId="tpee.1068581517665" type="tpee.LocalVariableDeclarationStatement" typeId="tpee.1068581242864" id="4410561908421477948" nodeInfo="nn">
+              <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4410561908421477949" nodeInfo="nr">
+                <property name="name" nameId="tpck.1169194664001" value="head" />
+                <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477950" nodeInfo="in">
+                  <link role="classifier" roleId="tpee.1107535924139" targetNodeId="1357303818382341941" resolveInfo="ITreePart" />
+                </node>
+                <node role="initializer" roleId="tpee.1068431790190" type="tpee.ArrayAccessExpression" typeId="tpee.1173175405605" id="4410561908421477951" nodeInfo="nn">
+                  <node role="index" roleId="tpee.1173175577737" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477952" nodeInfo="nn">
+                    <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477943" resolveInfo="headIdx" />
+                  </node>
+                  <node role="array" roleId="tpee.1173175590490" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477953" nodeInfo="nn">
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+                  </node>
+                </node>
+              </node>
+            </node>
+            <node role="statement" roleId="tpee.1068581517665" type="tpee.LocalVariableDeclarationStatement" typeId="tpee.1068581242864" id="4410561908421477954" nodeInfo="nn">
+              <node role="localVariableDeclaration" roleId="tpee.1068581242865" type="tpee.LocalVariableDeclaration" typeId="tpee.1068581242863" id="4410561908421477955" nodeInfo="nr">
+                <property name="name" nameId="tpck.1169194664001" value="cons" />
+                <node role="type" roleId="tpee.5680397130376446158" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477956" nodeInfo="in">
+                  <link role="classifier" roleId="tpee.1107535924139" targetNodeId="4410561908421478381" resolveInfo="ListBranch.Cons" />
+                  <node role="parameter" roleId="tpee.1109201940907" type="tpee.TypeVariableReference" typeId="tpee.1109283449304" id="4410561908421477957" nodeInfo="in">
+                    <link role="typeVariableDeclaration" roleId="tpee.1109283546497" targetNodeId="4410561908421478025" resolveInfo="T" />
+                  </node>
+                </node>
+                <node role="initializer" roleId="tpee.1068431790190" type="tpee.GenericNewExpression" typeId="tpee.1145552977093" id="4410561908421477958" nodeInfo="nn">
+                  <node role="creator" roleId="tpee.1145553007750" type="tpee.ClassCreator" typeId="tpee.1212685548494" id="4410561908421477959" nodeInfo="nn">
+                    <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="4410561908421478383" resolveInfo="ListBranch.Cons" />
+                    <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477960" nodeInfo="nn">
+                      <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477949" resolveInfo="head" />
+                    </node>
+                    <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477961" nodeInfo="nn">
+                      <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477943" resolveInfo="headIdx" />
+                    </node>
+                    <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.StaticMethodCall" typeId="tpee.1081236700937" id="4410561908421477962" nodeInfo="nn">
+                      <link role="classConcept" roleId="tpee.1144433194310" targetNodeId="4410561908421477892" resolveInfo="ListBranch" />
+                      <link role="baseMethodDeclaration" roleId="tpee.1068499141037" targetNodeId="4410561908421477937" resolveInfo="createList" />
+                      <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477963" nodeInfo="nn">
+                        <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477938" resolveInfo="parentPath" />
+                      </node>
+                      <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477964" nodeInfo="nn">
+                        <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477940" resolveInfo="elements" />
+                      </node>
+                      <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.PrefixIncrementExpression" typeId="tpee.1239709250944" id="4410561908421477965" nodeInfo="nn">
+                        <node role="expression" roleId="tpee.1239714902950" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477966" nodeInfo="nn">
+                          <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477943" resolveInfo="headIdx" />
+                        </node>
+                      </node>
+                      <node role="typeArgument" roleId="tpee.4972241301747169160" type="tpee.TypeVariableReference" typeId="tpee.1109283449304" id="4410561908421477967" nodeInfo="in">
+                        <link role="typeVariableDeclaration" roleId="tpee.1109283546497" targetNodeId="4410561908421478025" resolveInfo="T" />
+                      </node>
+                    </node>
+                    <node role="typeParameter" roleId="tpee.1212687122400" type="tpee.TypeVariableReference" typeId="tpee.1109283449304" id="4410561908421477968" nodeInfo="in">
+                      <link role="typeVariableDeclaration" roleId="tpee.1109283546497" targetNodeId="4410561908421478025" resolveInfo="T" />
+                    </node>
+                  </node>
+                </node>
+              </node>
+            </node>
+            <node role="statement" roleId="tpee.1068581517665" type="tpee.Statement" typeId="tpee.1068580123157" id="4410561908421477969" nodeInfo="nn" />
+            <node role="statement" roleId="tpee.1068581517665" type="tpee.SingleLineComment" typeId="tpee.6329021646629104954" id="4410561908421477970" nodeInfo="nn">
+              <node role="commentPart" roleId="tpee.6329021646629175155" type="tpee.TextCommentPart" typeId="tpee.6329021646629104957" id="4410561908421477971" nodeInfo="nn">
+                <property name="text" nameId="tpee.6329021646629104958" value="TODO: this smells" />
+              </node>
+            </node>
+            <node role="statement" roleId="tpee.1068581517665" type="tpee.IfStatement" typeId="tpee.1068580123159" id="4410561908421477972" nodeInfo="nn">
+              <node role="ifTrue" roleId="tpee.1068580123161" type="tpee.StatementList" typeId="tpee.1068580123136" id="4410561908421477973" nodeInfo="sn">
+                <node role="statement" roleId="tpee.1068581517665" type="tpee.ExpressionStatement" typeId="tpee.1068580123155" id="4410561908421477974" nodeInfo="nn">
+                  <node role="expression" roleId="tpee.1068580123156" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4410561908421477975" nodeInfo="nn">
+                    <node role="operation" roleId="tpee.1197027833540" type="tpee.InstanceMethodCallOperation" typeId="tpee.1202948039474" id="4410561908421477976" nodeInfo="nn">
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+                      <node role="actualArgument" roleId="tpee.1068499141038" type="tpee.VariableReference" typeId="tpee.1068498886296" id="4410561908421477977" nodeInfo="nn">
+                        <link role="variableDeclaration" roleId="tpee.1068581517664" targetNodeId="4410561908421477938" resolveInfo="parentPath" />
+                      </node>
+                    </node>
+                    <node role="operand" roleId="tpee.1197027771414" type="tpee.DotExpression" typeId="tpee.1197027756228" id="4410561908421477978" nodeInfo="nn">
+                      <node role="operand" roleId="tpee.1197027771414" type="tpee.ParenthesizedExpression" typeId="tpee.1079359253375" id="4410561908421477979" nodeInfo="nn">
+                        <node role="expression" roleId="tpee.1079359253376" type="tpee.CastExpression" typeId="tpee.1070534934090" id="4410561908421477980" nodeInfo="nn">
+                          <node role="type" roleId="tpee.1070534934091" type="tpee.ClassifierType" typeId="tpee.1107535904670" id="4410561908421477981" nodeInfo="in">
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