radiusByLayer method
Check if � radiusMap has a value for this 📚 layer
and return if so;
if not, then check if this 📚 layer
was initialized a specific double
(such as � baseRadius) and return if so;
finally, if all else fails, return const _BLUR
Implementation
double radiusByLayer(SurfaceLayer layer) {
switch (layer) {
case SurfaceLayer.BASE:
return literalRadiusBase;
case SurfaceLayer.MATERIAL:
return literalRadiusMaterial;
case SurfaceLayer.CHILD:
return literalRadiusChild;
}
}