span> <span class="arrow">&#45;&gt;</span></span> <a href="#type-t">t</a></span></code></div></div></details></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_singleton_or_more"><a href="#val-is_singleton_or_more" class="anchor"></a><code><span><span class="keyword">val</span> is_singleton_or_more : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-elt">elt</a> <a href="../../../../IStdlib/IContainer/index.html#type-singleton_or_more">IStdl