anchor.diff:      if (serializedParameter.isFunctionTyped) {
         FunctionElementImpl parameterTypeElement =
             new FunctionElementImpl('', -1);
  -      parameterTypeElement.setModifier(Modifier.SYNTHETIC, true);
  +      parameterTypeElement.synthetic = true;
         parameterElement.parameters =
             serializedParameter.parameters.map(buildParameter).toList();
         parameterTypeElement.enclosingElement = parameterElement;
  
positive.code:   void buildVariableCommonParts(PropertyInducingElementImpl element,
        UnlinkedVariable serializedVariable) {
      element.type = buildType(serializedVariable.type);
      element.setModifier(Modifier.CONST, serializedVariable.isConst);
      element.setModifier(Modifier.STATIC, serializedVariable.isStatic);
    }
  
    /**
  
negative.code:       executableElement.returnType = VoidTypeImpl.instance;
      }
      executableElement.type = new FunctionTypeImpl(executableElement);
      executableElement.hasImplicitReturnType =
          serializedExecutable.hasImplicitReturnType;
    }
  
    /**
  