getUnBanOption method 
    
    
    
  Implementation
  CometChatOption getUnBanOption(Group group, GroupMember member,
    {CometChatTheme? theme}) {
  return CometChatOption(
      id: GroupMemberOptionConstants.unban,
      icon: unbanIconUrl ?? AssetConstants.close,
      packageName: unbanIconUrlPackageName ?? UIConstants.packageName,
      backgroundColor: theme?.palette.getOption() ?? material.Colors.red,
      onClick: () async {
        CometChat.unbanGroupMember(
            guid: group.guid,
            uid: member.uid,
            onSuccess: (String result) async {
              CometChatGroupEvents.ccGroupMemberUnbanned(
                  cc.Action(
                    conversationId: _conversationId!,
                    message: '${loggedInUser?.name} unbanned ${member.name}',
                    oldScope: '',
                    newScope: '',
                    muid: DateTime.now().microsecondsSinceEpoch.toString(),
                    sender: loggedInUser!,
                    receiverUid: group.guid,
                    type: MessageTypeConstants.groupActions,
                    receiverType: ReceiverTypeConstants.group,
                    parentMessageId: 0,
                  ),
                  member,
                  loggedInUser!,
                  group);
            },
            onError: onError);
      });
}