/** A PromiseLike `then` that resolves with void when the handle's `finished` does. */
export type ThenFn = <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null, onrejected?: ((reason: unknown) => TResult2 | PromiseLike<TResult2>) | null) => Promise<TResult1 | TResult2>;
/** Build a handle's `then` from its `finished` promise (handles never reject). */
export declare const thenFinished: (finished: Promise<void>) => ThenFn;
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