title: WP_Query pass a unique identifier to be used for action hook later?
body: <p>I can't find it in the WP codex, but is there a way to pass a unique identifier for a custom WP_Query?</p>
  <p>I want to identify a particular query so I can perform an action hook function on it.</p>
  <pre><code>$args = array(
      'my_custom_id' =&gt; 'customidentifier'   &lt;-- something like this??
      'category_name' =&gt; 'news',
      'posts_per_page' =&gt; 3
  );
   
  $my_query = new WP_Query( $args );
  </code></pre>
  <p>Thanks in advance!</p>