@NotNull
  public static UnknownSdkFixAction createMissingSdkFixAction(@NotNull UnknownSdk unknownSdk,
                                                              @NotNull UnknownSdkDownloadableSdkFix downloadFix) {
    return new UnknownMissingSdkFixDownload(unknownSdk, downloadFix);
  }
@NotNull
  public static UnknownSdkFixAction createMissingSdkFixAction(@NotNull UnknownSdk unknownSdk,
                                                              @NotNull UnknownSdkDownloadableSdkFix downloadFix)