span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li><li class="tsd-description"><div class="tsd-parameters"><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameter-list"><li><h5><span class="tsd-kind-parameter">a</span>: <a href="IKeyValuePair.html" class="tsd-signature-type tsd-kind-interface">IKeyValuePair</a><span class="tsd-signature-symbol">&lt;</span><a class="tsd-signature-type tsd-kind-type-p