@NotNull
  @Override
  public Collection<VirtualFile> detectRoots(@NotNull VirtualFile rootCandidate,
                                             @NotNull ProgressIndicator progressIndicator) {
    return JavaVfsSourceRootDetectionUtil.suggestRoots(rootCandidate, progressIndicator);
  }
@NotNull
  @Override
  public Collection<VirtualFile> detectRoots(@NotNull VirtualFile rootCandidate,
                                             @NotNull ProgressIndicator progressIndicator)