int hashCode

Get a hash code for this object.

All objects have hash codes. Hash codes are guaranteed to be the same for objects that are equal when compared using the equality operator ==. Other than that there are no guarantees about the hash codes. They will not be consistent between runs and there are no distribution guarantees.

If a subclass overrides hashCode it should override the equality operator as well to maintain consistency.

Source 

int get hashCode {
  int result = 373;
  result = 37 * result + languageCode.hashCode;
  result = 37 * result + countryCode.hashCode;
  return result;
}