def loadVersion(file: File)(implicit formats: Formats): MinecraftVersion = {
  @tailrec
  def loadVersion0(f: File, inheritance: Option[MinecraftVersion => MinecraftVersion] = None): MinecraftVersion = {
    val result = parse(IO.read(f)).extract[MinecraftVersion]

    if (result.inheritsFrom != null) {
      val parentFile = new File(f.getParentFile, result.inheritsFrom + ".json")
      if (parentFile.exists()) {
        loadVersion0(parentFile, Some(v => inheritance.getOrElse(identity)(result.extendFrom(v))))
      } else {
        null
      }
    } else {
      inheritance.getOrElse(identity)(result)
    }
  }

  loadVersion0(file)
}