public override void paint(PaintingContext context, Offset offset)
{
if (child != null)
{
if (_alpha == 0)
{
layer = null;
return;
}
if (_alpha == 255)
{
layer = null;
context.paintChild(child, offset);
return;
}
D.assert(needsCompositing);
layer = context.pushOpacity(offset, _alpha, base.paint, oldLayer: layer as OpacityLayer);
}
}