public static boolean isValidIntroduceVariant(PsiElement element) {
    final PyCallExpression call = as(element.getParent(), PyCallExpression.class);
    if (call != null && call.getCallee() == element) {
      return false;
    }
    if (referencesComprehensionIteratorValue(element)) {
      return false;
    }
    return true;
  }
public static boolean isValidIntroduceVariant(PsiElement element)