private void highlight(@NotNull PsiVariable var) {
    if (myEditor != null) {
      PsiElement[] occurrences =
        ContainerUtil.map2Array(ReferencesSearch.search(var, new LocalSearchScope(myContainingFile)).findAll(), 
                                PsiElement.class,
                                ref -> ref.getElement());
      IntroduceVariableBase.highlightReplacedOccurrences(myProject, myEditor, occurrences);
    }
  }
private void highlight(@NotNull PsiVariable var)