c type" id="type-spec" class="anchored"><a href="#type-spec" class="anchor"></a><code><span><span class="keyword">type</span> spec</span><span> = </span><span>{</span></code><table><tr id="type-spec.source" class="anchored"><td class="def record field"><a href="#type-spec.source" class="anchor"></a><code><span>source : <a href="#type-t">t</a>;</span></code></td><td class="def-doc"><span class="comment-delim">(*</span><p>type of the returned source</p><span class="comment-delim">*)</span></td></tr><tr id="ty