export interface ProductShowEventProps {
    entry_name: string;
    item_id: string;
    ext_item_id: string;
    item_ean: string;
    recipe_id: string;
    product_base_price: string;
    index?: string;
}
/**
 * Dedupes product.show per recipe visit (recipeId:itemId).
 * Cleared at the start of each openRecipeDetails visit and by ContextService.loadAndSetupRecipe
 * at the start of each recipe-to-basket visit.
 */
export declare class ProductShowTracker {
    private static instance;
    private trackedKeys;
    private constructor();
    static getInstance(): ProductShowTracker;
    trackProductShow(analyticsPath: string, props: ProductShowEventProps): void;
    clearForRecipe(recipeId: string): void;
    clearAll(): void;
    destroy(): void;
    private handlePageUnload;
}
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