call method
Implementation
@override
Object call(Interpreter interpreter, List<Object?> arguments,
Map<Symbol, Object?> namedArguments) {
if (arguments.isEmpty) {
throw "Argument must be at least 1.";
}
double scale = parseDouble(namedArguments[const Symbol('scale')]) ?? 1;
return NetworkImage(arguments[0] as String, scale: scale);
}