ss="anchor"></a><code><span><span class="keyword">val</span> exists2 : <span><span><span class="type-var">'a</span> option</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> option</span> <span class="arrow">&#45;&gt;</span></span> <span>f:<span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <span class="arrow">&#45;&gt;</span></span> bool)</span> <span class="arrow">&#45;&gt;</span></spa