title: Unity 5.6 2D- How can I check if 2 colliders isn't touching any other collider?
body: <p>In Unity 5.6 C#, I know there is a way to check for if a collider is being touched by any other collider by using IsTouching.</p>
  
  <p>However, I would like to know how to group two colliders together(that are touching each other), and how to check if they both are touching any collider besides each other.</p>