/**
 * A promise which can be resolved from the outside.
 */
export interface ResolvablePromise<T> extends Promise<T> {
    readonly isResolved: boolean;
    readonly isRejected: boolean;
    readonly isSettled: boolean;
    readonly promise: Promise<T>;
    reject(reason?: unknown): void;
    resolve(value: T): void;
}
/**
 * Build a promise which can be resolved from the outside.
 */
export declare function resolvablePromise<T>(): ResolvablePromise<T>;
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