ing <code>f</code></p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-exists_call"><a href="#val-exists_call" class="anchor"></a><code><span><span class="keyword">val</span> exists_call : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><span class="label">f</span>:<span>(<span><a href="../PulseCallEvent/index.html#type-t">CallEvent.t</a> <span class="arrow">&#45;&gt;</span></span> bool)</span> <span class="arrow">&#45;&gt;</span></span> bool</span>