Issue in function getVariantSelectionFeatures of ProductWorker.java

//代码占位符
public static List<GenericValue> getVariantSelectionFeatures(GenericValue variantProduct) {
if (!"Y".equals(variantProduct.getString("isVariant"))) {
return null;
}
GenericValue virtualProduct = ProductWorker.getParentProduct(variantProduct.getString("productId"), variantProduct.getDelegator());
if (virtualProduct == null || !"Y".equals(virtualProduct.getString("productId"))) {
return null;
}

//代码占位符
if (virtualProduct == null || !"Y".equals(virtualProduct.getString("isVirtual"))) {