@Nullable
  private Sdk getDefaultJdk() {
    Project defaultProject = ProjectManagerEx.getInstanceEx().getDefaultProject();
    Sdk sdk = ProjectRootManagerEx.getInstanceEx(defaultProject).getProjectSdk();
    if (sdk == null) {
      sdk = AddModuleWizard.getMostRecentSuitableSdk(myContext);
    }
    return sdk;
  }
@Nullable
  private Sdk getDefaultJdk()