tion/UnmodifiableMapView/cast.html">cast</a></span><span class="signature">&lt;<wbr><span class="type-parameter">RK</span>, <span class="type-parameter">RV</span>&gt;</span><span class="signature">(<wbr>)
            <span class="returntype parameter">&#8594; <a href="../dart-core/Map-class.html">Map</a><span class="signature">&lt;<wbr><span class="type-parameter">RK</span>, <span class="type-parameter">RV</span>&gt;</span></span>
          </span>
                  </dt>
        <dd>
          Provides a v