anchor.diff:  
       jsAst.Expression init =
           js[classesCollector][className].assign(builder.toObjectInitializer());
  -    buffer.add(jsAst.prettyPrint(init.toStatement(), compiler));
  -    buffer.add(n);
  +    buffer.add(jsAst.prettyPrint(init, compiler));
  +    buffer.add('$N$n');
     }
   
     bool get getterAndSetterCanBeImplementedByFieldSpec => true;
  
positive.code:     block.statements.add(js.return_(js[objectName]['prototype']));
  
      buffer.add(jsAst.prettyPrint(
          js[isolateProperties][key].assign(
              js.fun(['receiver'], block)).toStatement(),
          compiler));
    }
  
    /**
  
negative.code:       }
        jsAst.Expression init = js[isolateProperties][name].assign(
            constantInitializerExpression(constant));
        buffer.add(jsAst.prettyPrint(init, compiler));
        buffer.add('$N');
      }
    }
  
  