an><span class="token keyword">operator override </span><span class="token keyword">fun </span><a href="iterator.html"><span class="token function">iterator</span></a><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">: </span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-iterator/index.html">MutableIterator</a><span class="token operator">&lt;</span><a href="index.html">T</a><span class="token operator">?</span><s