Absent</span>
(<wbr><span class="parameter" id="putIfAbsent-param-key"><span class="type-annotation">K</span> <span class="parameter-name">key</span>, </span> <span class="parameter" id="putIfAbsent-param-ifAbsent"><span class="type-annotation">V</span> <span class="parameter-name">ifAbsent</span>()</span>)
      <div class="features">override</div>
    </section>
    <section class="desc markdown">
      <p>Look up the value of <code>key</code>, or add a new value if it isn't there.</p>
<p>Returns the valu