/**
 * Copyright 2026 Adobe. All rights reserved.
 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
import type { ReactiveController, ReactiveElement } from 'lit';
import type { SystemVariant } from '@spectrum-web-components/theme';
export declare const systemResolverUpdatedSymbol: unique symbol;
export type ProvideSystem = {
    callback: (system: SystemVariant, unsubscribe: () => void) => void;
};
export declare class SystemResolutionController implements ReactiveController {
    private host;
    system: SystemVariant;
    private unsubscribe?;
    constructor(host: ReactiveElement);
    hostConnected(): void;
    hostDisconnected(): void;
    private resolveSystem;
}