call method
Implementation
@override
Object? call(Interpreter interpreter, List<Object?> arguments,
Map<Symbol, Object?> namedArguments) {
BorderSide side = BorderSide.none;
var sideParsed = namedArguments[const Symbol('side')];
if (sideParsed != null) {
side = sideParsed as BorderSide;
}
return CircleBorder(side: side);
}