 null if <code>key</code> is not in the map. <a href="dart-core/Map/operator_get.html">[...]</a>
          <div class="features">inherited</div>
</dd>
        <dt id="operator []=" class="callable inherited">
          <span class="name"><a href="dart-core/Map/operator_put.html">operator []=</a></span><span class="signature">(<wbr><span class="parameter" id="[]=-param-key"><span class="parameter-name">key</span>, </span> <span class="parameter" id="[]=-param-value"><span class="parameter-name">value</span><