Creates a copy of
datetime and adds the specified number of years to the
copy. Add negative values to subtract years.
As with g_date_time_add_months(), if the resulting date would be 29th February on a non-leap year, the day will be clamped to 28th February.
Available since: 2.26
The newly created
should be freed with g_date_time_unref(), or
|The caller of the method takes ownership of the data, and is responsible for freeing it.
|The return value can be