resetTarget method
Resets every property on targetId to its declared initial value.
Implementation
bool resetTarget(String targetId) {
final properties = _schemas[targetId];
final current = _values[targetId];
if (properties == null || current == null) return false;
final defaults = _defaultMap(properties);
if (_mapsEqual(current, defaults)) return true;
_values[targetId] = defaults;
notifyListeners();
return true;
}