{
  "definitions": {
    "address": {
      "type": "object",
      "properties": {
        "street_address": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "state": {
          "type": "string"
        }
      },
      "required": [
        "street_address",
        "city",
        "state"
      ]
    }
  },
  "type": "object",
  "properties": {
    "billing_address": {
      "title": "Billing address",
      "$ref": "#/definitions/address"
    },
    "shipping_address": {
      "title": "Shipping address",
      "$ref": "#/definitions/address"
    }
  },
  "required": [
    "shipping_address"
  ]
}