- RenderSliver child
The offset at which the given
child should be painted.
The returned offset is from the top left corner of the inside of the
viewport to the top left corner of the paint coordinate system of the
See also computeAbsolutePaintOffset, which computes the paint offset from an explicit layout offset and growth direction instead of using the values computed for the child during layout.
@protected Offset paintOffsetOf(RenderSliver child);