   <a href="Dereferenceable.html">Dereferenceable</a> type for which
      <code><a href=
      "pointee.html#pointee-spec">pointee</a>&lt;HeldType&gt;::type</code> is
      <code>T</code> or a class derived from <code>T</code>.</td>

      <td>Specifies the type that is actually embedded in a Python object
      wrapping a <code>T</code> instance when <code>T</code>'s constructor is
      called or when a <code>T</code> or <code>T*</code> is converted to
      Python without the use of <a href=
      "http