code: public static UnitResponse createMissingParam(Object theMissingParameters, String errMsg) {
          return UnitResponse.createError(Group.CODE_LACK_OF_PARAMETER, theMissingParameters, errMsg);
      }
docs: create a new unit response when missingParam
  
  @param theMissingParameters theMissingParameters array, leave it null, if you dont know which parameter is missing.
  @return the newly created response object describing the missed parameters.