import Sequence from "./Sequence";
export declare class MinBy {
    /**
     * Returns the minimum element by comparing the results of the given `selector` function
     * for each element of the sequence or `null` if the sequence is empty.
     *
     * @param {(value: T) => R} selector
     * @returns {T}
     */
    minBy<T, R>(this: Sequence<T>, selector: (value: T) => R): T | null;
}