resolve method

Return WxSheetStyle that depends on variant and severity

Implementation

WxSheetStyle resolve(WxSheetStyleResolverData data) {
  final effectiveData = WxSheetStyleResolverData(
    variant: effectiveStyle.variant,
    size: effectiveStyle.size,
    severity: effectiveStyle.severity,
  ).merge(data);
  final fromResolver = styleResolver?.call(effectiveData);
  return effectiveStyle.merge(fromResolver);
}