spr2.js

  processInventory = (action, widget) => {
    displayLoader();
    return this.updateInventories(action, widget);
  };

  updateInventories = (action, widget) => {
    switch (action) {
      case "REQUEST": {
        const { first, inventoryItems } = this.requestInventory(
          this.inventoryItems
        );
        this.inventoryItems = inventoryItems;
        return first;
      }
      case "CLEAR": {
        return this.clearInventory();
      }
      case "ADD": {
        return this.addToInventory(widget);
      }
      case "DELETE": {
        return this.deleteFromInventory(widget);
      }
    }
  };