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