@Nullable
    default UnknownSdkDownloadableSdkFix proposeDownload(@NotNull UnknownSdk sdk, @NotNull ProgressIndicator indicator, @Nullable @Nls String lookupReason) {
      return proposeDownload(sdk, indicator);
    }
@Nullable
    default UnknownSdkDownloadableSdkFix proposeDownload(@NotNull UnknownSdk sdk, @NotNull ProgressIndicator indicator, @Nullable @Nls String lookupReason)