docs: public /*@Nullable*/Downloader startGetFile(final String path, /*@Nullable*/String rev)
              throws DbxException
      {
          DbxPathV1.checkArgNonRoot("path", path);
          String apiPath = "1/files/auto" + path;
          /*@Nullable*/String[] params = {
              "rev", rev
          };
          return startGetSomething(apiPath, params);
      }