RoomsUpdate constructor
      
      RoomsUpdate({ 
    
    
- Map<String, JoinedRoomUpdate> ? join,
- Map<String, InvitedRoomUpdate> ? invite,
- Map<String, LeftRoomUpdate> ? leave,
- Map<String, KnockRoomUpdate> ? knock,
Implementation
RoomsUpdate({
  this.join,
  this.invite,
  this.leave,
  this.knock,
});