@NotNull
  private static String normalizePreReleaseType(@NotNull String preReleaseType) {
    if (preReleaseType.equalsIgnoreCase("a") || preReleaseType.equalsIgnoreCase("alpha")) {
      return "a";
    }
    else if (preReleaseType.equalsIgnoreCase("b") || preReleaseType.equalsIgnoreCase("beta")) {
      return "b";
    }
    else {
      return "rc";
    }
  }
@NotNull
  private static String normalizePreReleaseType(@NotNull String preReleaseType)