onRequestToJoinReceivedFromGroup method Null safety
Occurs when a group join application is received from an applicant.
Param groupId
The group ID.
Param groupName
The group name.
Param applicant
The username of the applicant.
Param reason
The reason.
Implementation
void onRequestToJoinReceivedFromGroup(
String groupId, String? groupName, String applicant, String? reason);