import type { FocusGroupItemCollection, FocusGroupOptions, FocusGroupUpdateInfo } from "./focusgroup-items.js";
/**
 * @import {
 *   FocusGroupItemCollection,
 *   FocusGroupOptions,
 *   FocusGroupUpdateInfo,
 * } from "./focusgroup-items.js"
 * @import {FocusGroupDefinition} from "./utils.js"
 */
export declare class FocusGroup {
    #private;
    /**
     * @param {HTMLElement!} owner - The focus group owner element.
     * @param {FocusGroupItemCollection} items - The items collection providing
     *     item discovery and queries.
     * @param {FocusGroupOptions} [options]
     */
    constructor(owner: HTMLElement, items: FocusGroupItemCollection, options?: FocusGroupOptions);
    /**
     * Tears down the focus group: disables the owner proxy, removes all event
     * listeners (via the abort signal), then disconnects the items collection
     * if it supports it.
     *
     * Ordering matters: owner-proxy teardown can trigger `flushAllObservers()`,
     * which expects the items' observer to still be in the global registry.
     * The items' own `disconnect()` is therefore called last.
     *
     * NOTE: This method does not undecorate the elements. Call it only after
     * the focusgroup owner has been removed from the DOM.
     */
    disconnect(): void;
    /**
     * Reconciles decoration state in response to relevant changes. Call this
     * whenever the focus group should refresh — e.g. items were added or
     * removed, the owner's `focusgroup` attribute changed, or an author set
     * `tabindex` on a decorated item.
     *
     * The polyfill's default `TreeWalkerItemCollection` calls this from a
     * `MutationObserver`. App-supplied collections (or app code that knows
     * when its model changed) can call it directly.
     *
     * @param {FocusGroupUpdateInfo} [info]
     */
    update(info?: FocusGroupUpdateInfo): void;
}