protected RangeMarker createRangeMarker(final PsiElement elt) {
    final PsiFile psiFile = elt.getContainingFile();
    final PsiDocumentManager instance = PsiDocumentManager.getInstance(elt.getProject());
    final Document document = instance.getDocument(psiFile);
    return document.createRangeMarker(elt.getTextRange());
  }
protected RangeMarker createRangeMarker(final PsiElement elt)