@Nullable
  private static PsiElement findNameIdentifier(Editor editor, PsiFile file, TextRange toDuplicate) {
    int nonWs = CharArrayUtil.shiftForward(editor.getDocument().getCharsSequence(), toDuplicate.getStartOffset(), "\n\t ");
    PsiElement psi = file.findElementAt(nonWs);
    PsiElement named = null;
    while (psi != null) {
      TextRange range = psi.getTextRange();
      if (range == null || psi instanceof PsiFile || !toDuplicate.contains(psi.getTextRange())) {
        break;
      }
      if (psi instanceof PsiNameIdentifierOwner) {
        named = ((PsiNameIdentifierOwner)psi).getNameIdentifier();
      }
      psi = psi.getParent();
    }
    return named;
  }
@Nullable
  private static PsiElement findNameIdentifier(Editor editor, PsiFile file, TextRange toDuplicate)