import type { ReactiveController } from 'lit';
/**
 * This class is used to manage the context of a controller.
 * It is specially useful when we have nested components that need to handle
 * events via the same controller.
 */
export declare class ControllerContextManager {
    private static instances;
    private controllerStack;
    static getInstance(controllerType: string): ControllerContextManager;
    pushController(controller: ReactiveController): void;
    getActiveController(): ReactiveController | null;
    popController(controller: ReactiveController): void;
    isActive(controller: ReactiveController): boolean;
}