y was absent.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">V remove(Object key) {
  if (!_validKey(key)) return null;
  _SplayTreeMapNode&lt;K, V&gt; mapRoot = _remove(key);
  if (mapRoot != null) return mapRoot.value;
  return null;
}</code></pre>
    </section>

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