code: public ModbusRequest buildReturnQueryData(int serverAddress, int queryData) throws ModbusNumberException {
          return buildDiagnostics(DiagnosticsSubFunctionCode.RETURN_QUERY_DATA, serverAddress, queryData);
      }
docs: The data passed in the request data field is to be returned (looped back) in the response. The
  entire response message should be identical to the request.
  
  @param serverAddress a slave address
  @param queryData     request data field
  @return DiagnosticsRequest instance
  @throws ModbusNumberException if server address is in-valid