value property Null safety

Implementation

String get value {
  switch (this) {
    case CommandType.userMessage:
      return 'MESG';
    case CommandType.userMessageUpdate:
      return 'MEDI';
    case CommandType.fileMessage:
      return 'FILE';
    case CommandType.fileMessageUpdate:
      return 'FEDI';
    case CommandType.adminMessage:
      return 'ADMM';
    case CommandType.adminMessageUpdate:
      return 'AEDI';
    case CommandType.broadcastMessage:
      return 'BRDM';
    case CommandType.deleteMessage:
      return 'DELM';
    case CommandType.delivery:
      return 'DLRV';
    case CommandType.read:
      return 'READ';
    case CommandType.memberCountChange:
      return 'MCNT';
    case CommandType.reaction:
      return 'MRCT';
    case CommandType.threading:
      return 'MTHD';
    case CommandType.userEvent:
      return 'USEV';
    case CommandType.systemEvent:
      return 'SYEV';
    case CommandType.sessionExpired:
      return 'EXPR';
    case CommandType.login:
      return 'LOGI';
    case CommandType.enter:
      return 'ENTR';
    case CommandType.exit:
      return 'EXIT';
    case CommandType.mack:
      return 'MACK';
    case CommandType.typingStart:
      return 'TPST';
    case CommandType.typingEnd:
      return 'TPEN';
    case CommandType.ping:
      return 'PING';
    case CommandType.error:
      return 'EROR';
    case CommandType.pollVote:
      return 'VOTE';
    case CommandType.pollUpdate:
      return 'PEDI';
  }
}