public void OnTriggerExit2D(Collider2D other)
 {
     if (other.tag == "ObjectsUse")
     {
         objectsUse = null;
     }
 }
 public override void OnTriggerEnter2D(Collider2D other)
 {
     if (other.tag == "ObjectsUse")
     {
         objectsUse = other.GetComponent <IObjectsUse> ();
     }
     base.OnTriggerEnter2D(other);
 }