cancelScheduledMessage method
      
Future<void> 
cancelScheduledMessage(
    
- int scheduledMessageId, {
- OnScheduledMessageCancelCallback? callback,
Cancels scheduled message
Implementation
Future<void> cancelScheduledMessage(
  int scheduledMessageId, {
  OnScheduledMessageCancelCallback? callback,
}) async {
  try {
    return _sdk.api.send(
      GroupChannelScheduledMessageCancelRequest(
        channelUrl: channelUrl,
        scheduledMessageId: scheduledMessageId,
      ),
    );
  } catch (e) {
    if (callback != null) {
      final error = SBError(message: 'Failed Sending Request');
      callback(error);
    }
  }
}