title: What's the correct type hint for a type hint?
body: <p>I have a use case for accepting type hints as arguments to a function. But what is the right type hint to to accept a type hint?</p>
  <pre><code>T = TypeVar('T', bound='TypeHintType')
  
  def register_handler(type_hint: T, handler: Handler[T]) -&gt; None:
      ...
  </code></pre>
  <p>Is there a &quot;TypeHintType&quot; that I can use to annotate that a type hint is expected as an argument?</p>