@Override
  @Nullable
  protected JpsElementCollection<? extends JpsLibrary> getCollection(@NotNull JpsCompositeElement parent) {
    return parent.getContainer().getChild(JpsLibraryRole.LIBRARIES_COLLECTION_ROLE);
  }
@Override
  @Nullable
  protected JpsElementCollection<? extends JpsLibrary> getCollection(@NotNull JpsCompositeElement parent)