A force applied to slow angular movement of any Collider2D in contact with the effector.
Angular drag provides the ability to slow Collider2D in contact with the effector. Increasing the angular drag simulates an increasingly viscous fluid making it harder for colliders to rotate within it.
It is similar to ::Rigidbody2D::angularDrag but is more complex in that drag is applied not only as a function of velocity but also takes into account the Collider2D submerged area.