l/commonMain"><div class="symbol monospace"><span class="token keyword">expect </span><span class="token keyword">operator </span><span class="token keyword">fun </span><a href="contains.html"><span class="token function">contains</span></a><span class="token punctuation">(</span><span class="parameters "><span class="parameter ">key<span class="token operator">: </span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html">String</a></span></span><span class="token punctuation">)<