clearDraft method

Implementation

void clearDraft() async {
  await engineProvider.engine?.clearDraftMessage(
    _con.conversationType ?? RCIMIWConversationType.invalid,
    _con.targetId ?? '',
    _con.channelId,
    callback: IRCIMIWClearDraftMessageCallback(
      onDraftMessageCleared: (code) {
        if (code == 0) {
          _con.draft = null;
          notifyListeners();
        }
      },
    ),
  );
}