/**
 * Container component responsible for:
 * - Displaying a combined list of swatches from all selected products
 * - Showing a preview section and an action button
 * - Handling the opening of the Multi-Product Cart modal
 *
 * It collects materials from all products, normalizes them with additional
 * context (product name), and renders them in a structured two-column layout.
 *
 * Also includes the "Add Swatches to Cart" button which opens the cart modal
 * only when there are selected items.
 *
 * @component
 */
export declare const SwatchContentContainer: () => import("react/jsx-runtime").JSX.Element;