n> bool</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_trait"><a href="#val-is_trait" class="anchor"></a><code><span><span class="keyword">val</span> is_trait : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> bool</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_variadic"><a href="#val-is_variadic" class="anchor"></a><code><span><span class="keyword">val</span> is_variadic : <span><a href="#type