age property
The age of the location in seconds, with millisecond precision: how long before the SDK received the location
the native API had fixed it. For example, if the reported age is 10.0, that location was fixed 10s before the
SDK received it. recordedAt is the time the SDK received it.
Before version 5, age was an integer number of milliseconds. If your code compares it against a millisecond
value, divide that value by 1000.
Implementation
late double age;