import type { Waitable } from './types/waitable';
/** Checks if the specified value is a waitable */
export declare const isWaitable: (value: any) => value is Waitable<any, any>;
/** Returns a readonly waitable if the specified value is a waitable.  Otherwise, returns undefined */
export declare const ifWaitable: <SuccessT, FailureT>(value: any) => Waitable<SuccessT, FailureT> | undefined;
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