ng" class="anchor"></a><code><span><span class="keyword">val</span> external_warning : <span><span><span>(<span class="type-var">'a</span>, <span class="xref-unresolved">F</span>.formatter, unit)</span> <a href="../../IStdlib/IStd/index.html#type-format">IStdlib.IStd.format</a></span> <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'a</span></span></code></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-debug_kind"><a href="#type-debug_kind" class="anchor"></a><c