import { Disposable } from './disposable';
/**
 * Manages the lifecycle of a disposable value that may be changed.
 *
 * This ensures that when the disposable value is changed, the previously held disposable is disposed of. You can
 * also register a `MutableDisposable` on a `Disposable` to ensure it is automatically cleaned up.
 */
export declare class MutableDisposable<T extends Disposable> implements Disposable {
    private _value?;
    private _isDisposed;
    constructor();
    get value(): T | undefined;
    set value(value: T | undefined);
    clear(): void;
    dispose(): void;
    /**
     * Clears the value, but does not dispose it.
     * The old value is returned.
     */
    clearAndLeak(): T | undefined;
}