@Override
  public String @NotNull [] getContentRootUrls() {
    Collection<ContentEntry> content = getContent();
    if (content.isEmpty()) return ArrayUtilRt.EMPTY_STRING_ARRAY;
    List<String> result = new ArrayList<>(content.size());

    for (ContentEntry contentEntry : content) {
      result.add(contentEntry.getUrl());
    }

    return ArrayUtilRt.toStringArray(result);
  }
@Override
  public String @NotNull [] getContentRootUrls()