Decrements the shadow count on @mount. Usually used by
#GVolumeMonitor implementations when destroying a shadow mount for
@mount, see g_mount_is_shadowed() for more information. The caller
will need to emit the #GMount::changed signal on @mount manually.
Decrements the shadow count on @mount. Usually used by #GVolumeMonitor implementations when destroying a shadow mount for @mount, see g_mount_is_shadowed() for more information. The caller will need to emit the #GMount::changed signal on @mount manually.