eter-name">key</span>, </span> <span class="parameter" id="param-value"><span class="type-annotation">V</span> <span class="parameter-name">value</span></span>)</span>)
      <div class="features">inherited</div>
    </section>
    <section class="desc markdown">
      <p>This operation is not supported by an unmodifiable map.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">v