pe-spec.index" class="anchored"><td class="def record field"><a href="#type-spec.index" class="anchor"></a><code><span>index : <span>int option</span>;</span></code></td><td class="def-doc"><span class="comment-delim">(*</span><p>index of the returned source if Some; return value if None</p><span class="comment-delim">*)</span></td></tr></table><code><span>}</span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-get" class="anchored"><a href="#val-get" class="anchor"></a><code><span