 class="token operator">?</span><span class="token operator"> = </span>null</span></span><span class="token punctuation">)</span> : <a href="../index.html">SimpleMeteringCollectorAppender.Instrument</a><span class="clearfix"><span class="floating-right">(<a href="https://github.com/smyrgeorge/log4k/tree/main/log4k/src/commonMain/kotlin/io/github/smyrgeorge/log4k/impl/appenders/simple/SimpleMeteringCollectorAppender.kt#L199">source</a>)</span></span></div><h4 class="">Inheritors</h4><div class="table"><div c