readDateTimeJsonObject function
Reads a date/time JSON object, found in the station list for example.
Implementation
DateTime readDateTimeJsonObject(Map<String, dynamic> json) {
final time = json['time'];
if (time is! int) {
throw FormatException(
'Unexpected time format in date/time JSON object!',
time,
);
}
return DateTime.fromMillisecondsSinceEpoch(time);
}