latLngToTimezoneString function
The provided code is written by Tim Cooper: tim@edval.com.au This code is available under the MIT licence: https://opensource.org/licenses/MIT
Implementation
// class TimezoneMapper {
String latLngToTimezoneString(num lat, num lng) {
String tzId = _timezoneStrings[_getTzInt(lat, lng)];
return tzId;
}