Gets the drive for the mount.
This is a convenience method for getting the GVolume and then using that object to get the GDrive
a GDrive or NULL if mount is not associated with a volume or a drive. The returned object should be unreffed with g_object_unref() when no longer needed.
Gets the drive for the mount.
This is a convenience method for getting the GVolume and then using that object to get the GDrive