"type-annotation"><a href="dart-core/num-class.html">num</a></span> <span class="parameter-name">x0</span></span> <span class="parameter" id="createRadialGradient-param-y0"><span class="type-annotation"><a href="dart-core/num-class.html">num</a></span> <span class="parameter-name">y0</span></span> <span class="parameter" id="createRadialGradient-param-r0"><span class="type-annotation"><a href="dart-core/num-class.html">num</a></span> <span class="parameter-name">r0</span></span> <span class="parameter" id="