import type { PuckData } from '@pantheon-systems/css-client';
/**
 * Deep-copies a PuckData snapshot and prefixes every component id with
 * `prefix`. This prevents Puck from sharing id-keyed internal state between
 * panels rendered in the same React tree (e.g. source vs target in merge
 * comparison views). Components that share an id across branches via CoW
 * inheritance would otherwise have their props bleed from one panel to another.
 */
export declare function namespacePuckData(data: PuckData, prefix: string): PuckData;