pec.source" class="anchored"><td class="def field"><a href="#type-spec.source" class="anchor"></a><code>source : <a href="index.html#type-t">t</a>;</code></td><td class="doc"><p>type of the returned source</p></td></tr><tr id="type-spec.index" class="anchored"><td class="def field"><a href="#type-spec.index" class="anchor"></a><code>index : <span>int option</span>;</code></td><td class="doc"><p>index of the returned source if Some; return value if None</p></td></tr></table><code>}</code></dt></dl><dl><dt cl