private static ByteArrayOutputStream getBaseRevisionContents(@NotNull SvnVcs vcs, @NotNull VirtualFile file) {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try {
      byte[] contents = SvnUtil.getFileContents(vcs, Target.on(virtualToIoFile(file)), Revision.BASE, Revision.UNDEFINED);
      bos.write(contents);
    }
    catch (VcsException | IOException e) {
      LOG.warn(e);
    }
    return bos;
  }
private static ByteArrayOutputStream getBaseRevisionContents(@NotNull SvnVcs vcs, @NotNull VirtualFile file)