getClosestTo(object, callback, callbackContext) → {any}
Get the closest child to given Object, with optional callback to filter children. This can be a Sprite, Group, Image or any object with public x and y properties. 'close' is determined by the distance from the objects x and y properties compared to the childs x and y properties. You can use the optional callback argument to apply your own filter to the distance checks.If the child is closer then the previous child, it will be sent to cal