clipRSuperellipse method
Reduces the clip region to the intersection of the current clip and the given rounded superellipse.

If doAntiAlias is true, then the clip will be anti-aliased.
If multiple draw commands intersect with the clip boundary, this can result in incorrect blending at the clip boundary. See saveLayer for a discussion of how to address that and some examples of using clipRSuperellipse.
Implementation
@override
void clipRSuperellipse(ui.RSuperellipse rse, {bool doAntiAlias = true}) =>
parent.clipRSuperellipse(rse, doAntiAlias: doAntiAlias);