---
elements:
  - type: Hidden
    name: outer_count
  
  - type: Repeatable
    counter_name: outer_count
    elements:
      - name: foo
        constraints:
            - 'Repeatable::Any'
      
      - type: Hidden
        name: inner_count
      
      - type: Repeatable
        counter_name: inner_count
        elements:
          - name: foo
            constraints:
              - 'Repeatable::Any'