/**
 * Creates a stable object that forwards every read to `getTarget()`.
 *
 * `App*` wrappers provide a cell or header through context once, while the
 * instance behind them can change (e.g. `data` is replaced and a keyed
 * `{#each}` reuses the component with a new cell). Reading `getTarget()` inside
 * a reactive scope also tracks the source prop, so consumers update with it.
 *
 * Prototype methods are called with the current instance as `this`, so
 * per-instance memos never see the proxy. The forwarders are cached per key so
 * method identity stays stable across target changes.
 */
export declare function createLiveProxy<T extends object>(getTarget: () => T): T;