94; <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 this map are transformed by
the given <code>f</code> function.
                  <div class="features">override</div>
</dd>
        <dt id="putIfAbsent" class="callable">
          <span class="name"><a href="dart-collection/MapMixi