</span><span class="signature">(<wbr><span class="parameter" id="map-param-f"><span class="type-annotation"><a href="dart-core/MapEntry-class.html">MapEntry</a><span class="signature">&lt;K2, V2&gt;</span></span> <span class="parameter-name">f</span>(<span class="parameter" id="f-param-key"><span class="type-annotation">K</span> <span class="parameter-name">key</span>, </span> <span class="parameter" id="f-param-value"><span class="type-annotation">V</span> <span class="parameter-name">value</span></span>)<