{
  "$defs": {
    "DefaultParent": {
      "properties": {
        "before": {
          "default": 10,
          "title": "Before",
          "type": "integer"
        },
        "value": {
          "default": 1,
          "title": "Value",
          "type": "integer"
        },
        "after": {
          "default": 30,
          "title": "After",
          "type": "integer"
        }
      },
      "title": "DefaultParent",
      "type": "object",
      "x-is-base-class": true
    },
    "DefaultChild": {
      "allOf": [
        {
          "$ref": "#/$defs/DefaultParent"
        }
      ],
      "properties": {
        "value": {
          "default": 2,
          "title": "Value",
          "type": "integer"
        },
        "added": {
          "default": 40,
          "title": "Added",
          "type": "integer"
        }
      },
      "title": "DefaultChild",
      "type": "object",
      "x-is-base-class": true
    }
  },
  "allOf": [
    {
      "$ref": "#/$defs/DefaultChild"
    }
  ],
  "properties": {
    "extra": {
      "default": 50,
      "title": "Extra",
      "type": "integer"
    }
  },
  "title": "InheritedGrandChild",
  "type": "object"
}