message: Updating items to remove additional properties
diff: "parts": {
  "type": "array",
  "description": "The dashboard parts.",
  - "additionalProperties": {
  - "$ref": "#/definitions/DashboardParts"
  - },
  "items": {
  - "type": "object"
  + "$ref": "#/definitions/DashboardParts"
  }
  },
  "metadata": {
  "lenses": {
  "type": "array",
  "description": "The dashboard lenses.",
  - "additionalProperties": {
  - "$ref": "#/definitions/DashboardLens"
  - },
  "items": {
  - "type": "object"
  + "$ref": "#/definitions/DashboardLens"
  }
  },
  "metadata": {
  