anchor.diff:    updatedAt(
       format: String
   
  -    # A tz database time zone, otherwise falls back to `X-TIMEZONE` header
  +    # A tz database time zone, otherwise falls back to "X-TIMEZONE" header. See
  +    # http://www.iana.org/time-zones,
  +    # https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
       timezone: String
     ): String
   }
  
positive.code:   updatedAt(
      format: String
  
      # A tz database time zone, otherwise falls back to `X-TIMEZONE` header
      timezone: String
    ): String!
  }
  
negative.code:   updatedAt(
      format: String
  
      # A tz database time zone, otherwise falls back to "X-TIMEZONE" header. See
      # http://www.iana.org/time-zones,
      # https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
      timezone: String
    ): String!
  }
  