virtual void JoinChatRoomPublic ( const [FChatRoomId](API\Plugins\OnlineSubsystem\Interfaces\FChatRoomId) & RoomId, const [FChatRoomConfig](API\Plugins\OnlineSubsystem\Interfaces\FChatRoomConfig) & InChatRoomConfig, [ESocialSubsystem](API\Plugins\Party\ESocialSubsystem) InSocialSubsystem )