code: func (h *Client) ProductImpressionPrice(productImpressionPrice float64) *Client {
  	h.productImpressionPrice = productImpressionPrice
  	h.productImpressionPriceSet = true
  	return h
  }
docs: // The price of a 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.