title: I want to use OnTriggerNotTouching() like OnTriggerStay()
body: <pre><code>public a;
  private void OnTriggerStay(Collider other)
  {
      a = true;
  }
  </code></pre>
  
  <p>This code makes a true while touching and false when away,</p>
  
  <p>If this hit other collider suddenly disappears with Destroy(),
  OnTriggerExit() is not called and a always becomes true.</p>
  
  <pre><code>private void OnTriggerStay(Collider other)
  {}else{}
  </code></pre>
  
  <p>It would be easier if I could do that ...</p>
  
  <p>Is there such a method?</p>