Retrieves the list of group names of the bookmark for uri.
In the event the URI cannot be found, NULL is returned and
error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND.
The returned array is NULL terminated, so length may optionally
be NULL.
Since 2.12
Retrieves the list of group names of the bookmark for uri. In the event the URI cannot be found, NULL is returned and error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND. The returned array is NULL terminated, so length may optionally be NULL. Since 2.12