l">Radius</a></span> <span class="parameter-name">a</span>, </span> <span class="parameter" id="lerp-param-b"><span class="type-annotation"><a href="dart-ui/Radius-class.html">Radius</a></span> <span class="parameter-name">b</span>, </span> <span class="parameter" id="lerp-param-t"><span class="type-annotation"><a href="dart-core/double-class.html">double</a></span> <span class="parameter-name">t</span></span>)
            <span class="returntype parameter">&#8594; <a href="dart-ui/Radius-class.html">Radius