payorcCheckoutDefaultTextStyle function
Base style for DefaultTextStyle.merge so Text widgets that only set size/color still pick up the face.
Implementation
TextStyle payorcCheckoutDefaultTextStyle(String fontName) {
final name = fontName.trim();
if (name.isEmpty) return const TextStyle(inherit: true);
return _mergeCheckoutFontIntoStyle(const TextStyle(inherit: true), name);
}