export type Destructor = () => unknown;
export declare class Destructors {
    private destructors;
    add: (d: Destructor) => void;
    /**
     * cleans up and keep state valid. cleans up and invalidates children.
     */
    cleanup: () => void;
}
export declare class CallbacksCleanup {
    private cacheByState;
    resetDestructors(refId: number): Destructors;
}
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