code: @Override
      public UserToUserInformationMessage createUSR() {
          UserToUserInformationMessage msg = new UserToUserInformationMessageImpl(_U2U_HOLDER.mandatoryCodes,
                  _U2U_HOLDER.mandatoryVariableCodes, _U2U_HOLDER.optionalCodes, _U2U_HOLDER.mandatoryCodeToIndex,
                  _U2U_HOLDER.mandatoryVariableCodeToIndex, _U2U_HOLDER.optionalCodeToIndex);
          return msg;
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.isup.ISUPMessageFactory#createUSR()