I have an object hierarchy with multiple coliders, and the parent has a rigidbody on it. I have learned now that each collider will cascade it's collision messages up the hierarchy to the first rigidbody it finds.
The method signature for collisions is: `OnTriggerEnter2D(Collider2D other)`, which allows me to know what has collided into my object. However, since I have multiple colliders on my object that could have generated this message, I don't currently know which part of my object was collided into. Is there an easy way to know which one?
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