Increments the shadow count on @mount. Usually used by
#GVolumeMonitor implementations when creating 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.
Increments the shadow count on @mount. Usually used by #GVolumeMonitor implementations when creating 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.