| 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.