e>expand-to-foreign-dyn</code>, the third generic
function in this interface.  This is especially useful when you can
allocate something much more efficiently if you know the object has
dynamic extent, as is the case with function calls that don't save the
relevant allocated arguments.

   <p>This exactly what we need for the <code>my-string</code> type:

<pre class="lisp">  <span class="paren1">(<span class="lisp-bg"><i><span class="symbol">defmethod</span></i> expand-from-foreign <span class="paren2">(<sp