pan class="token operator">?</span><span class="token operator"> = </span>null</span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html">Boolean</a></div><p class="paragraph">Determines whatever the declaration ha the default value.</p><span class="kdoc-tag"><h4 class="">Return</h4><p class="paragraph"><code class="lang-kotlin">true</code> if the declaration has the specified default value (or 