XDG tips here
MIME
gio for gnome users
gio mime inode/directory
gio mime org.gnome.Nautilus.desktop
xdg-utils
xdg-mime query default inode/directory
xdg-mime default org.gnome.Nautilus.desktop inode/directory
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gio for gnome users
gio mime inode/directory
gio mime org.gnome.Nautilus.desktop
xdg-utils
xdg-mime query default inode/directory
xdg-mime default org.gnome.Nautilus.desktop inode/directory