       * via the `patternProperty` "^[a-z]{2}$".
       *
       * This interface was referenced by `undefined`'s JSON-Schema definition
       * via the `patternProperty` "^[a-z]{2}$".
       *
       * This interface was referenced by `undefined`'s JSON-Schema definition
       * via the `patternProperty` "^[a-z]{2}$".
       */
      [k: string]: string;
    };