Generic Hygrostat: Away mode based on "flag"

In the generic_hygrostat configuration, it is possible to deal with the away mode (boolean true/false values accepted).
This makes it difficult to automate this part, moving it automatically to the target away value when desired.
Is there a built-in way to do this not documented in the hygrostat doc?

Can we imagine something like the following?

- name: "Hygrostat Cuisine"
  humidifier: switch.test_switch
  target_sensor: sensor.mysensor
  min_humidity: 30
  max_humidity: 80
  target_humidity: 60
  dry_tolerance: 3
  wet_tolerance: 0
  device_class: "dehumidifier"
  min_cycle_duration:
    seconds: 5
  keep_alive:
    minutes: 3
  away_humidity: 70
  away_fixed: input_boolean.away
  initial_state: true
  sensor_stale_duration: 00:15:00

or maybe with a away_template parameter instead?