ed"><a href="#val-log_message" class="anchor"></a><code><span><span class="keyword">val</span> log_message : <span>label:string <span class="arrow">&#45;&gt;</span></span> <span>message:string <span class="arrow">&#45;&gt;</span></span> unit</span></code></div><div class="spec-doc"><p>Log a <code>string</code>. Event is prefixed with <code>&quot;msg.&quot;</code></p></div></div><div class="odoc-spec"><div class="spec value" id="val-cost_log_message" class="anchored"><a href="#val-cost_log_message" class="an