title: Unity check if 2D objects in an array collide without OnCollisionEnter
body: <p>I have Rigidbody2D and 2D colliders attached to my GameObjects. Is there a way to check if there is a collision between any two of my objects? I found a way: method OnCollisionEnter(), but I want to check for collision in a specific time between specific objects, but not between all. Is there a way to do that? Thanks in advance!</p>