GtkFileChooserNative offers to unmount shared directories
- Launch rhythmbox
- Launch a file chooser
- See that the eject button is present for the shared Music folder.
In the /proc/self/mountinfo
output:
639 427 8:5 /hadess/Music /home/hadess/Music rw,nosuid,nodev,relatime master:34 - ext4 /dev/sda5 rw,seclabel,data=ordered