|lobbyPlayer||The lobby player object.|
|gamePlayer||The game player object.|
bool False to not allow this player to replace the lobby player.
This is called on the server when it is told that a client has finished switching from the lobby scene to a game player scene.
When switching from the lobby, the lobby-player is replaced with a game-player object. This callback function gives an opportunity to apply state from the lobby-player to the game-player object.