class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span></h5><ul class="tsd-parameters"><li class="tsd-parameter-signature"><ul class="tsd-signatures"><li class="tsd-signature" id="__type.isPresetTheme.__type-15.__type-16"><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">themeOrType</span><span class="tsd-signature-symbol">?</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">bool