t</a></span> <span class="parameter-name">matrix4</span>, </span> <span class="parameter" id="radial-param-focal"><span class="type-annotation"><a href="dart-ui/Offset-class.html">Offset</a></span> <span class="parameter-name">focal</span>, </span> <span class="parameter" id="radial-param-focalRadius"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">focalRadius</span> = <span class="default-value">0.0</span></span> ])</span>
        </dt>
   