"keyword">val</span> for_all : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>f:<span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> bool)</span></span> <span>&#45;&gt;</span> bool</code></dt><dt class="spec value" id="val-sum"><a href="#val-sum" class="anchor"></a><code><span class="keyword">val</span> sum : <span>(<span class="keyword">module</span> Base__.Container_intf.Summable <span class="keyword">with</span> <span class="keyword"