initTreeByCode method
build tree by any code provinceId or cityCode or areaCode @param code build a tree @return Point a province with its cities and areas tree
Implementation
Point initTreeByCode(String code) {
String _code = code.toString();
if (this._provincesData[_code] != null) {
return initTree(code);
}
String? provinceId = _getProvinceByCode(code);
if (provinceId != null) {
return initTree(provinceId);
}
return Point.nullPoint();
// return Point.nullPoint;
}