DateResult<T>  constructor 
Represents the result of the date extraction. Contains the extracted date, along with additional date information.
Implementation
DateResult(Map<String, dynamic> nativeDateResult) {
  date = Date(nativeDateResult);
  originalString = handleStringType(nativeDateResult, "originalString");
  isFilledByDomainKnowledge = nativeDateResult["isFilledByDomainKnowledge"];
  successfullyParsed = nativeDateResult["successfullyParsed"];
}