<fxlayout>
  <page name="Spin Gradient Iwa">
    <control>center</control>
    <control>curveType</control>
   <separator label="Start"/>
    <control>startAngle</control>
    <control>startColor</control>
   <separator label="End"/>
    <control>endAngle</control>
    <control>endColor</control>
  </page>
</fxlayout>
