/**
 * @schema CreateCartCreateLineItem
 * type: object
 * description: The item's items.
 * x-schemaName: CreateCartCreateLineItem
 * required:
 *   - quantity
 *   - variant_id
 * properties:
 *   quantity:
 *     type: string
 *     title: quantity
 *     description: The item's quantity.
 *   variant_id:
 *     type: string
 *     title: variant_id
 *     description: The item's variant id.
 *   title:
 *     type: string
 *     title: title
 *     description: The item's title.
 *   subtitle:
 *     type: string
 *     title: subtitle
 *     description: The item's subtitle.
 *   thumbnail:
 *     type: string
 *     title: thumbnail
 *     description: The item's thumbnail.
 *   product_id:
 *     type: string
 *     title: product_id
 *     description: The item's product id.
 *   product_title:
 *     type: string
 *     title: product_title
 *     description: The item's product title.
 *   product_description:
 *     type: string
 *     title: product_description
 *     description: The item's product description.
 *   product_subtitle:
 *     type: string
 *     title: product_subtitle
 *     description: The item's product subtitle.
 *   product_type:
 *     type: string
 *     title: product_type
 *     description: The item's product type.
 *   product_collection:
 *     type: string
 *     title: product_collection
 *     description: The item's product collection.
 *   product_handle:
 *     type: string
 *     title: product_handle
 *     description: The item's product handle.
 *   variant_sku:
 *     type: string
 *     title: variant_sku
 *     description: The item's variant sku.
 *   variant_barcode:
 *     type: string
 *     title: variant_barcode
 *     description: The item's variant barcode.
 *   variant_title:
 *     type: string
 *     title: variant_title
 *     description: The item's variant title.
 *   variant_option_values:
 *     type: object
 *     description: The item's variant option values.
 *   requires_shipping:
 *     type: boolean
 *     title: requires_shipping
 *     description: The item's requires shipping.
 *   is_discountable:
 *     type: boolean
 *     title: is_discountable
 *     description: The item's is discountable.
 *   is_tax_inclusive:
 *     type: boolean
 *     title: is_tax_inclusive
 *     description: The item's is tax inclusive.
 *   is_giftcard:
 *     type: boolean
 *     title: is_giftcard
 *     description: The item's is giftcard.
 *   compare_at_unit_price:
 *     type: string
 *     title: compare_at_unit_price
 *     description: The item's compare at unit price.
 *   unit_price:
 *     type: string
 *     title: unit_price
 *     description: The item's unit price.
 *   metadata:
 *     type: object
 *     description: The item's metadata.
 * 
*/