Add compile-time field iteration for serialization

de.peeeq.wurstscript/src/main/java/de/peeeq/wurstio/languageserver/ModelManagerImpl.java

@@ -7,6 +7,7 @@
 import de.peeeq.wurstio.WurstCompilerJassImpl;
 import de.peeeq.wurstio.utils.FileUtils;
 import de.peeeq.wurstscript.RunArgs;
+import de.peeeq.wurstscript.SyntacticSugar;
 import de.peeeq.wurstscript.WLogger;
 import de.peeeq.wurstscript.ast.*;
 import de.peeeq.wurstscript.attributes.CompileError;
@@ -97,6 +98,7 @@ public Changes removeCompilationUnit(WFile resource) {
                 }
             }
             GlobalCaches.clearLookupCacheFor(toRemove);
+            toRemove.forEach(SyntacticSugar::restoreDirectFieldIterations);
             model2.removeAll(toRemove);
         }
 
@@ -267,6 +269,7 @@ private void clearCompilationUnits(Collection<CompilationUnit> toCheck) {
     }
 
     private void clearCompilationUnit(CompilationUnit cu) {
+        SyntacticSugar.restoreDirectFieldIterations(cu);
         cu.clearAttributes();
         // clear module instantiations
         for (WPackage p : cu.getPackages()) {