rrow">&#45;&gt;</span></span> unit )</span> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-log_file" class="anchored"><a href="#val-log_file" class="anchor"></a><code><span><span class="keyword">val</span> log_file : string</span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-verbose" class="anchored"><a href="#val-verbose" class="anchor"></a><code><span><span class="keyword">val</span> verbose : boo