Calling methods/using fields on this component after calling disposeComponent is undefined behaviour, and could result in a null pointer exception/x is null exceptions.
Lists components under a specific point in global, screen coordinates.
Note: this function will return *every single* components at a specific point, even if they have no backgrounds, or haven't got anything drawn onto them.
Parameters
screenX:Float
The global, on-screen x position of the point to check for components under
screenY:Float
The global, on-screen y position of the point to check for components under
type:Class<T> = null
Used to filter all components that aren't of a specific type. null by default, which means no filter is applied.
Returns
An array of all components that overlap the "global" position (x, y)
Iterates over the children components and calls callback() on each of them, recursively. The children's children are also included in the walking, and so are those children's children...
