import type { Nullable } from '../../../types/misc.js';
export type CombineOptions = {
    noTrim?: boolean;
    addTrail?: boolean | string;
    addStart?: boolean | string;
    separator?: string;
    trimSymbol?: string;
};
export declare namespace CombineOptions {
    function merge(...options: Nullable<CombineOptions>[]): CombineOptions;
}
export declare function combineUrls(options: Nullable<CombineOptions>, ...parts: Nullable<string>[]): string;
export declare function combineUrls(...parts: Nullable<string>[]): string;