public String toString() {
    PsiElement element = getElement();
    if (element != null) {
      if (element instanceof PsiVariable) {
        return ((PsiVariable)element).getName();
      }
      else if (element instanceof PsiMethod) {
        return ((PsiMethod)element).getName() + "()";
      }
      else if (element instanceof PsiClass) {
        PsiIdentifier identifier = ((PsiClass)element).getNameIdentifier();
        if (identifier == null) return "";
        return identifier.getText();
      }
    }
    return super.toString();
  }
public String toString()