private static boolean hasMatchingNull(@NotNull PsiSwitchLabelStatementBase label) {
    PsiCaseLabelElementList labelElementList = label.getCaseLabelElementList();
    return labelElementList != null &&
           ContainerUtil.exists(labelElementList.getElements(),
                                el -> el instanceof PsiExpression expr && ExpressionUtils.isNullLiteral(expr));
  }
private static boolean hasMatchingNull(@NotNull PsiSwitchLabelStatementBase label)