When provided, the Interactor will perform an extra check to ensure nothing is blocking the line between the Hmd (head of the player) and the teleport origin (hand).
Making it impossible to teleport if the user is placing their hands behind a virtual wall.
If the interactor has an interactable, then that's the teleport location. Otherwise it just projects the end of the arc onto the ground and uses that as the target.
This optional delegate method offers one chance to accept or reject a valid target destination.
It will be executed upon the current Interactable and desired target Pose in order to allow selection.Return true to allow Selection, false to disallow selection. When it is not set, it always allows to select valid interactables.
