Sensor: Systemmonitor Process

The documentation of the systemmonitor integration shows the possibility to monitor certain host processes:

sensor:
- platform: systemmonitor
  scan_interval: 60
  resources:
  - type: process
    arg: 'VBoxHeadless'
  - type: process
    arg: 'glances'

But whatever is entered as arg: (and the process is running) – it is off all the time (and doesn’t switch to on if the process gets terminated, so at least it’s not only a wrong way 'round-implementation).

How are we supposed to use this (or is it broken and we’d have to use a command_line sensor for the time being)?
It’s no binary_sensor, that much is true (systemmonitor only supports sensors, even if they are binary by nature)…