work_time-1.0.x-dev/config/schema/work_time.schema.yml

field.formatter.settings.worktime:
  type: mapping
  label: Work time formatter settings
  mapping:
    field_reference:
      type: string
      label: Field reference

work_time.settings:
  type: config_object
  label: 'Work time settings.'
  mapping:
    holidays:
      type: string
      label: 'Holidays setup.'
    hours:
      type: string
      label: 'Work hours a day.'
    filter:
      type: string
      label: 'Filter week/month by default.'