private void validateOKButton() {
    boolean isEnabled = true;
    String text = myOldNameField.getText();
    text = text.trim();
    PsiManager manager = PsiManager.getInstance(myProject);
    if (!PsiNameHelper.getInstance(manager.getProject()).isQualifiedName(text)){
      isEnabled = false;
    }
    text = myNewNameField.getText();
    text = text.trim();
    if (!PsiNameHelper.getInstance(manager.getProject()).isQualifiedName(text)){
      isEnabled = false;
    }
    setOKActionEnabled(isEnabled);
  }
private void validateOKButton()