onRequestToJoinDeclinedFromGroup method Null safety
Occurs when a group-join application is declined.
Param groupId
The group ID.
Param groupName
The group name.
Param decliner
The username of the decliner.
Param reason
The reason.
Implementation
void onRequestToJoinDeclinedFromGroup(
String groupId, String? groupName, String decliner, String? reason);