Gets whether the private flag of the bookmark for uri is set.
In the event the URI cannot be found, FALSE is returned and
error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND. In the
event that the private flag cannot be found, FALSE is returned and
error is set to G_BOOKMARK_FILE_ERROR_INVALID_VALUE.
Since 2.12
Gets whether the private flag of the bookmark for uri is set. In the event the URI cannot be found, FALSE is returned and error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND. In the event that the private flag cannot be found, FALSE is returned and error is set to G_BOOKMARK_FILE_ERROR_INVALID_VALUE. Since 2.12