import type { WidgetData } from "../../domain";
/**
 * Build a unique storage ID from instanceKey, journey, and userId.
 * Uses the format: instanceKey:journey:userId (filters out falsy values)
 *
 * @param instanceKey - The widget instance key
 * @param data - The widget data containing journey/form_id and user identification
 * @returns A colon-separated storage ID string
 */
export declare function buildStorageId(instanceKey: string, data: WidgetData): string;
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