export type CachedRendererSlot<T = unknown> = {
    component: T;
    wrapped: unknown;
};
export declare class MountRegistry {
    private entries;
    private nextId;
    /** Per-accessor cached cellRenderer wrappers. */
    readonly cellRendererCache: Map<string, CachedRendererSlot<unknown>>;
    /** Per-accessor cached headerRenderer wrappers. */
    readonly headerRendererCache: Map<string, CachedRendererSlot<unknown>>;
    /**
     * Register a dispose callback for a mount container. Tags the container so
     * {@link disposeHost} can find it when core discards an ancestor host.
     */
    register(container: HTMLElement, dispose: () => void): void;
    /** True when `container` is a live registered mount host (not yet disposed). */
    isRegistered(container: HTMLElement): boolean;
    /**
     * Tear down mounts owned by a host element core is permanently discarding.
     * Collects `host` itself plus every descendant tagged with {@link MOUNT_ID_ATTR}.
     */
    disposeHost: (host: HTMLElement) => void;
    /** Dispose every tracked mount (used on table teardown). */
    clear(): void;
    /**
     * Drop cached wrappers for accessors no longer present in the header tree.
     */
    pruneRendererCaches(liveAccessors: ReadonlySet<string>): void;
    /** Test helper — number of live mounts. */
    get size(): number;
}