How to use the @reactioncommerce/api-utils/graphql/namespaces.js.CartItem function in @reactioncommerce/api-utils

import { toFixed } from "accounting-js";
import getRateObjectForRate from "@reactioncommerce/api-utils/getRateObjectForRate.js";
import namespaces from "@reactioncommerce/api-utils/graphql/namespaces.js";
import ReactionError from "@reactioncommerce/reaction-error";
import { xformCatalogProductMedia } from "./catalogProduct";
import { assocInternalId, assocOpaqueId, decodeOpaqueIdForNamespace, encodeOpaqueId } from "./id";
import { decodeProductOpaqueId } from "./product";

export const assocCartInternalId = assocInternalId(namespaces.Cart);
export const assocCartOpaqueId = assocOpaqueId(namespaces.Cart);
export const decodeCartOpaqueId = decodeOpaqueIdForNamespace(namespaces.Cart);
export const encodeCartOpaqueId = encodeOpaqueId(namespaces.Cart);

export const assocCartItemInternalId = assocInternalId(namespaces.CartItem);
export const assocCartItemOpaqueId = assocOpaqueId(namespaces.CartItem);
export const decodeCartItemOpaqueId = decodeOpaqueIdForNamespace(namespaces.CartItem);
export const encodeCartItemOpaqueId = encodeOpaqueId(namespaces.CartItem);

export const assocFulfillmentGroupInternalId = assocInternalId(namespaces.FulfillmentGroup);
export const assocFulfillmentGroupOpaqueId = assocOpaqueId(namespaces.FulfillmentGroup);
export const decodeFulfillmentGroupOpaqueId = decodeOpaqueIdForNamespace(namespaces.FulfillmentGroup);
export const encodeFulfillmentGroupOpaqueId = encodeOpaqueId(namespaces.FulfillmentGroup);

/**
 * @param {Object[]} items Array of CartItemInput
 * @returns {Object[]} Same array with all IDs transformed to internal
 */
export function decodeCartItemsOpaqueIds(items) {
  return items.map((item) => ({
    ...item,

import { toFixed } from "accounting-js";
import getRateObjectForRate from "@reactioncommerce/api-utils/getRateObjectForRate.js";
import namespaces from "@reactioncommerce/api-utils/graphql/namespaces.js";
import ReactionError from "@reactioncommerce/reaction-error";
import { xformCatalogProductMedia } from "./catalogProduct";
import { assocInternalId, assocOpaqueId, decodeOpaqueIdForNamespace, encodeOpaqueId } from "./id";
import { decodeProductOpaqueId } from "./product";

export const assocCartInternalId = assocInternalId(namespaces.Cart);
export const assocCartOpaqueId = assocOpaqueId(namespaces.Cart);
export const decodeCartOpaqueId = decodeOpaqueIdForNamespace(namespaces.Cart);
export const encodeCartOpaqueId = encodeOpaqueId(namespaces.Cart);

export const assocCartItemInternalId = assocInternalId(namespaces.CartItem);
export const assocCartItemOpaqueId = assocOpaqueId(namespaces.CartItem);
export const decodeCartItemOpaqueId = decodeOpaqueIdForNamespace(namespaces.CartItem);
export const encodeCartItemOpaqueId = encodeOpaqueId(namespaces.CartItem);

export const assocFulfillmentGroupInternalId = assocInternalId(namespaces.FulfillmentGroup);
export const assocFulfillmentGroupOpaqueId = assocOpaqueId(namespaces.FulfillmentGroup);
export const decodeFulfillmentGroupOpaqueId = decodeOpaqueIdForNamespace(namespaces.FulfillmentGroup);
export const encodeFulfillmentGroupOpaqueId = encodeOpaqueId(namespaces.FulfillmentGroup);

/**
 * @param {Object[]} items Array of CartItemInput
 * @returns {Object[]} Same array with all IDs transformed to internal
 */
export function decodeCartItemsOpaqueIds(items) {
  return items.map((item) => ({
    ...item,
    productConfiguration: {