The Pointer Drag Start Input Event.
This event is dispatched by the Input Plugin belonging to a Scene if a pointer starts to drag any Game Object.
Listen to this event from within a Scene using:
A Pointer can only drag a single Game Object at once.
To listen for this event from a specific Game Object, use the
GAMEOBJECT_DRAG_START event instead.
The Pointer responsible for triggering this event.
The interactive Game Object that this pointer is dragging.