version: '0.10'
variables:
- family:
    name: leader
    description: leader
    leadership: true
    variables:
    - variable:
        name: leader
        multi: true
        value:
        - text: a
        - text: b
        - text: c
    - variable:
        name: follower1
        type: number
constraints:
- fill:
  - name: calc_val
    param:
    - type: index
    target:
    - text: follower1