title: is it possible in php to get a list of classes that use a particular trait?
body: <p>I want to get a list of classes that use a certain trait, eg:</p>
  
  <pre><code>trait Baz { }
  
  class Foo { use Baz; }
  
  class Bar { use Baz; }
  
  
  $classes = getClassesThatUseTrait('Baz');
  
  // $classes is ['Foo', 'Bar']
  </code></pre>
  
  <p>Is it possible?</p>