iew of this map as having <code>RK</code> keys and <code>RV</code> instances,
if necessary. <a href="../dart-collection/UnmodifiableMapView/cast.html">[...]</a>
                  <div class="features">override</div>
</dd>
        <dt id="addAll" class="callable inherited">
          <span class="name"><a href="../dart-collection/UnmodifiableMapView/addAll.html">addAll</a></span><span class="signature">(<wbr><span class="parameter" id="addAll-param-other"><span class="type-annotation"><a href="../dart-core/M