@Override
  protected @NotNull Collection<? extends ProjectStructureElement> getProjectStructureElements() {
    final List<ProjectStructureElement> result = new ArrayList<>();
    for (Sdk sdk : myJdksTreeModel.getProjectSdks().values()) {
      result.add(new SdkProjectStructureElement(myContext, sdk));
    }
    return result;
  }
@Override
  protected @NotNull Collection<? extends ProjectStructureElement> getProjectStructureElements()