substitutions:
  A: component1
  B: component2
  C: component3

packages:
  - some_component:
      - id: component1
        value: 1
      - id: !extend ${B}
        value: 4
      - id: !extend ${B}
        value: 5
      - id: component3
        value: 6

some_component:
  - id: !extend ${A}
    value: 2
  - id: component2
    value: 3
  - id: !remove ${C}