json_schema: {
      "$schema": "http://json-schema.org/draft-07/schema#",
      "description": "schema for type argument",
      "type": "object",
      "properties": {
          "Z1K1": {
              "enum": [
                  "Z18"
              ]
          },
          "Z18K1": {
              "type": "string",
              "pattern": "^([ZB][1-9][0-9]*)?K[1-9][0-9]*$"
          }
      },
      "required": [
          "Z1K1",
          "Z18K1"
      ],
      "additionalProperties": false
  }