er-concept">ResultConverter</a> or 
  <a href="to_python_converter.html#to_python_converter-spec">to_python_converter</a>.
  The classes in this header file are meant to be used when implmenting <code>get_pytype</code>.
  There are also <code>_direct</code> versions of the templates of <code>class T</code> which
  should be used with undecorated type parameter, expected to be in the conversion registry when the module loads.
  </p>

  <h2><a name="classes" id="classes"></a>Classes</h2>

  <h3><a name="wrap_