arameter"><a href="../dart-core/String-class.html">String</a></span>&gt;</span></span>
          </span>
                  </dt>
        <dd>
           
                  
</dd>
        <dt id="has" class="callable">
          <span class="name"><a href="../dart-html/StylePropertyMapReadonly/has.html">has</a></span><span class="signature">(<wbr><span class="parameter" id="has-param-property"><span class="type-annotation"><a href="../dart-core/String-class.html">String</a></span> <span class="parameter-name