code: func (h *Client) ProductImpressionName(productImpressionName string) *Client {
  	h.productImpressionName = productImpressionName
  	h.productImpressionNameSet = true
  	return h
  }
docs: // The name of the product. Impression List index must be a
  // positive integer between 1 and 200, inclusive. Product index
  // must be a positive integer between 1 and 200, inclusive.
  // For analytics.js the Enhanced Ecommerce plugin must be installed
  // before using this field.