public GameServerInstance withGameServerGroupArn(String gameServerGroupArn) {
        setGameServerGroupArn(gameServerGroupArn);
        return this;
    }
<p>
A generated unique identifier for the game server group that includes the game server instance.
</p>

@param gameServerGroupArn
       A generated unique identifier for the game server group that includes the game server instance.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/model/GameServerInstance.java