/**
 * A Monad object that can apply a flatMap/chain function.
 *
 * @template T The input type.
 */
export interface IChainable<T> {
    /**
     * Calls a defined callback function on each element of an object, and returns a new Chainable that contains the results.
     *
     * @template U The output type.
     * @param callbackfn The chain method calls the callbackfn function one time for each element in the Mappable.
     * @returns A new Chainable of the results.
     */
    chain<U>(callbackfn: (value: T) => IChainable<U>): IChainable<U>;
    chain<U>(callbackfn: (value: T) => U): IChainable<U>;
}