>'a</span> <span>&#45;&gt;</span> <span class="type-var">'a</span>)</span></span> <span>&#45;&gt;</span> <span class="type-var">'a</span></code></dt><dt class="spec value" id="val-group"><a href="#val-group" class="anchor"></a><code><span class="keyword">val</span> group : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>break:<span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> bool