     <div class="constructor-modifier features">const</div>
          <div class="constructor-modifier features">factory</div>
        </dd>
      </dl>
    </section>

    <section class="summary offset-anchor" id="instance-properties">
      <h2>Properties</h2>

      <dl class="properties">
        <dt id="key" class="property">
          <span class="name"><a href="dart-core/MapEntry/key.html">key</a></span>
          <span class="signature">&#8594; K</span>         
        </dt>
        <dd>
         