code: public boolean isLambdaArgument(String arg) {
          if (lambdaArgs == null) {
              return false;
          }
  
          for (int i = lambdaArgs.size() - 1; i >= 0; i--) {
              Map<String, Object> lmap = lambdaArgs.elementAt(i);
              if (lmap.containsKey(arg)) {
                  return true;
              }
          }
          return false;
      }
docs: Inquires if the name is a LambdaArgument
  @param arg A possible Lambda formal parameter name
  @return true if arg is a LambdaArgument, false otherwise.