/*
ga('ec:addImpression', {
'id': "BP_415279", // Product ID.
'name': "Le Brun de Neuville Au Bout de Chemin Rose de Noirs & Blancs Extra Brut NV", // Product name.
'category': "[]", // Product category.
'brand': "Le Brun De Neuville", // Product brand.
'variant': "", // Product variant.
'list': "Product Searching List", // Specify the place showing the product.
'position': 14 // Product position (number).
});
ga('send', 'pageview'); // When finish firing the impression data of the displayed products
*/