import { ReactiveController, ReactiveElement } from './types.js';
type Expanded = ReactiveElement & {
    expanded?: boolean | null;
    _internals?: ElementInternals;
};
export declare class StateExpandedController<T extends Expanded> implements ReactiveController {
    private host;
    constructor(host: T);
    hostConnected(): void;
    hostUpdated(): void;
}
export {};