fromJson static method
Implementation
@visibleForTesting
static Rect? fromJson(jsonObject) {
  if (jsonObject == null) return null;
  var result = Rect._privateConstructor();
  result._left = jsonObject["left"];
  result._top = jsonObject["top"];
  result._right = jsonObject["right"];
  result._bottom = jsonObject["bottom"];
  return result;
}