__get_active_units () { __systemctl $1 list-units \
| { while read -r a b; do echo " $a"; done; }; }
__get_startable_units () {
__get_active_units () { __systemctl $1 list-units \
| { while read -r a b; do echo " $a"; done; }; }
__get_startable_units () {