Not sure i quite understand the question but - at any one time only 1 component can have the input focus (often simply "focus") in a scene. Now, if that component does not handle the input event (by having onKeyEvent() return `true`), it will "bubble up" the component tree till a node handles it explicitly or by default behavior. To this, a single `.setFocus(true)` on a node takes the focus away from the previous holder - in a way it's like passing the baton in a relay race.
