lastReceivedMessage method Null safety

Future<EMMessage?> lastReceivedMessage()

Gets the latest message from the conversation.

Return The message instance.

Implementation

Future<EMMessage?> lastReceivedMessage() async {
  Map req = this._toJson();
  Map result = await _emConversationChannel.invokeMethod(
      ChatMethodKeys.getLatestMessageFromOthers, req);
  try {
    EMError.hasErrorFromResult(result);
    if (result.containsKey(ChatMethodKeys.getLatestMessageFromOthers)) {
      return EMMessage.fromJson(
          result[ChatMethodKeys.getLatestMessageFromOthers]);
    } else {
      return null;
    }
  } on EMError catch (e) {
    throw e;
  }
}