@Nullable
  private static String getRevisionedContentFrom(@Nullable ContentRevision contentRevision) {
    if (contentRevision == null) {
      return null;
    }

    try {
      return contentRevision.getContent();
    }
    catch (VcsException e) {
      LOG.warn("Can't get content for: " + contentRevision, e);
      return null;
    }
  }
@Nullable
  private static String getRevisionedContentFrom(@Nullable ContentRevision contentRevision)