" class="anchor"></a><code><span class="keyword">val</span> has_block_prefix : string <span>&#45;&gt;</span> bool</code></dt><dt class="spec value" id="val-unsome"><a href="#val-unsome" class="anchor"></a><code><span class="keyword">val</span> unsome : string <span>&#45;&gt;</span> <span><a href="index.html#type-t">t</a> option</span> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt></dl><dl><dt class="spec type" id="type-typ"><a href="#type-typ" class="anchor"></a><code><span class="keyw