@NotNull
  @Override
  protected Collection<? extends ProjectStructureElement> getProjectStructureElements() {
    final List<ProjectStructureElement> result = new ArrayList<>();
    for (Module module : myModuleManager.getModules()) {
      result.add(new ModuleProjectStructureElement(myContext, module));
    }
    return result;
  }
@NotNull
  @Override
  protected Collection<? extends ProjectStructureElement> getProjectStructureElements()