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    "bodies": {
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    },
    "bounds": {
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    },
    "composites": {
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    },
    "constraints": {
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    },
    "gravity": {
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    },
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    "isModified": true,
    "label": "World",
    "parent": "",
    "type": "composite"
  },
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  {
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    },
    "min": {
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    }
  },
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      "#v": [
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      ]
    },
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  },
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    }
  ],
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    "id": 5,
    "label": "Mouse Constraint",
    "length": 0.01,
    "pointA": {
      "#": 8
    },
    "pointB": {
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    },
    "render": {
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    },
    "stiffness": 0.1,
    "type": "constraint"
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  {
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  {
    "lineWidth": 3,
    "strokeStyle": "#90EE90",
    "visible": true
  },
  {
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    "x": 0,
    "y": 1
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]