set static method
Implementation
static bool set(WidgetModel model, String id, String propertyOrFunction,
List<dynamic> arguments, Scope scope) {
// value
var value = elementAt(arguments, 0);
// property - default is value
// we can now use dot notation to specify the property
// rather than pass it as an attribute
var property = elementAt(arguments, 1);
var key = Binding.toKey(id, property);
// set the binding value
scope.setObservable(key, value?.toString());
return true;
}