banGroupMember static method
      
Future<String?> 
banGroupMember({ 
    
- required String guid,
- required String uid,
- required dynamic onSuccess(- String result
 
- required dynamic onError(- CometChatException excep
 
Admin or Moderator of a group can ban a member of the group
guid The GUID of the group from which user is to be banned
uid The UID of the user to be banned
Banned user cannot rejoin the group.
method could throw PlatformException with error codes specifying the cause
Implementation
static Future<String?> banGroupMember(
    {required String guid,
    required String uid,
    required Function(String result)? onSuccess,
    required Function(CometChatException excep)? onError}) async {
  try {
    final result = await channel.invokeMethod('banGroupMember', {
      'guid': guid,
      'uid': uid,
    });
    if (onSuccess != null) onSuccess(result);
    return result;
  } on PlatformException catch (p) {
    _errorCallbackHandler(null, p, null, onError);
  } catch (e) {
    _errorCallbackHandler(null, null, e, onError);
  }
  return null;
}