public bool SubscribeCollisionEvent(Guid GUID, PhysicsCollisionHandler collisionHandler)
        {
            var subscribed = false;

            if (collisionEvents.ContainsKey(GUID))
            {
                collisionEvents[GUID] += collisionHandler;
                subscribed             = true;
            }

            return(subscribed);
        }
        public bool SubscribeCollisionEvent(Guid GUID, PhysicsCollisionHandler collisionHandler)
        {
            var subscribed = false;

            if (collisionEvents.ContainsKey(GUID))
            {
                collisionEvents[GUID] += collisionHandler;
                subscribed = true;
            }

            return subscribed;
        }