---
root:
  items:
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      id: 101
      complex:
        - rect: [100, 100, 760, 340]
          radius: [32, 32]
    - type: clip-chain
      id: 201
      clips: [101]
    - type: gradient
      bounds: 0 0 960 540
      start: 0 0
      end: 960 0
      stops: [0.0, red,
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              0.25, red,
              0.25, green,
              0.375, yellow,
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