n></pre></dt>
<dd>
Checks if a callback is registered to this event handler.
&nbsp;&nbsp;<a
href="/tree/master/crow/event.nim#L85"
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</dd>
<dt id="clearHandlers"><a name="clearHandlers,EventHandler"></a><pre><span class="Keyword">proc</span> <span class="Identifier">clearHandlers</span><span class="Other">(</span><span class="Identifier">handler</span><span class="Other">:</sp