[{
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       "type":"ClutterGroup",
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       "rotation-center-z-gravity":"center",
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     }
  ]}
  ,{
  "type":"ClutterState",
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  "transitions":[
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        "target":"pre",
        "keys": [["actor", "opacity",  "linear", 0]]
      },
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        "source":null,
        "target":"show",
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      },
      {
        "source":null,
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  ]}
]