idioms/idiom/settings/v2/packages/project.json

{
  "__version__": "1.0.6",
  "general": {
    "designResolution": {
      "width": 750,
      "height": 1634,
      "fitHeight": true
    }
  },
  "custom_joint_texture_layouts": [],
  "layer": [
    {
      "name": "Cube",
      "value": 1
    }
  ],
  "physics": {
    "collisionGroups": [
      {
        "index": 1,
        "name": "Cube"
      },
      {
        "index": 2,
        "name": "Plane"
      }
    ],
    "collisionMatrix": {
      "0": 1,
      "1": 6,
      "2": 2
    }
  }
}