@NotNull
  @Override
  protected Collection<? extends ProjectStructureElement> getProjectStructureElements() {
    final List<ProjectStructureElement> result = new ArrayList<>();
    for (LibraryConfigurable libraryConfigurable : getLibraryConfigurables()) {
      result.add(new LibraryProjectStructureElement(myContext, libraryConfigurable.getEditableObject()));
    }
    return result;
  }
@NotNull
  @Override
  protected Collection<? extends ProjectStructureElement> getProjectStructureElements()