Gets the time when the bookmark for uri was last modified.
In the event the URI cannot be found, null is returned and error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND.
a valid URI
a #GDateTime
Gets the time when the bookmark for uri was last modified.
In the event the URI cannot be found, null is returned and error is set to G_BOOKMARK_FILE_ERROR_URI_NOT_FOUND.