ameter-name">key</span>, </span> <span class="parameter" id="transform-param-value"><span class="type-annotation">V</span> <span class="parameter-name">value</span></span>)</span>)
            <span class="returntype parameter">&#8594; <a href="dart-core/Map-class.html">Map</a><span class="signature">&lt;<wbr><span class="type-parameter">K2</span>, <span class="type-parameter">V2</span>&gt;</span></span>
          </span>
                  </dt>
        <dd>
          Returns a new map where all entries of 