n class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> list</span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="index.html#type-t">t</a></span></code></dt><dd><p>Monadic bind. It's just <a href="index.html#val-concat_map"><code>concat_map</code></a></p></dd></dl><dl><dt class="spec value" id="val-return"><a href="#val-return" class="anc