g to <span class=font-it>c</span>.</p><p>IDL pointers of kind <span class=machine><span class=font-tt>unique</span></span> are mapped to an <span class=machine><span class=font-tt>option</span></span> type. The
option value is <span class=machine><span class=font-tt>None</span></span> for a null pointer, and <span class=machine><span class=font-tt>Some(</span></span><span class=font-it>v</span><span class=machine><span class=font-tt>)</span></span>
for a non-null pointer to a C value <span class=font-it>c</