     <dd>
          Creates a radial gradient centered at <code>center</code> that ends at <code>radius</code>
distance from the center. <a href="dart-ui/Gradient/Gradient.radial.html">[...]</a>
        </dd>
        <dt id="Gradient.sweep" class="callable">
          <span class="name"><a href="dart-ui/Gradient/Gradient.sweep.html">Gradient.sweep</a></span><span class="signature">(<span class="parameter" id="sweep-param-center"><span class="type-annotation"><a href="dart-ui/Offset-class.html">Offset</a></s