 verbosity for debug output. Each level enables all the levels before it.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-debug"><a href="#val-debug" class="anchor"></a><code><span><span class="keyword">val</span> debug : 
  <span><a href="#type-debug_kind">debug_kind</a> <span class="arrow">&#45;&gt;</span></span>
  <span><a href="#type-debug_level">debug_level</a> <span class="arrow">&#45;&gt;</span></span>
  <span><span><span>(<span class="type-var">'a</span>, <span class="