Runs the processing to "update" the current instance.
This is conceptually similar to
Unity's built-in update mechanism, but bound to a structure which allows execution order to be more explicitly controlled. This is part of
Interaction SDK core logic, and it is not recommended that direct dependencies be taken on this execution order. Instead, changes to interaction state should be handled by observing events such as
IInteractorView.WhenStateChanged, which will allow correct handling without depending on the details of execution order.
