Enable certain nodes only when visible. The VisibilityEnabler2D will disable [RigidBody2D], [AnimationPlayer], and other nodes when they are not visible. It will only affect other nodes within the same scene as the VisibilityEnabler2D itself. This enabler will pause [AnimationPlayer] nodes. This enabler will freeze [RigidBody2D] nodes. This enabler will stop [Particles2D] nodes. This enabler will stop the parent's _process function. This enabler will stop the parent's _physics_process function.