/**
 * Builds a query string from a given object, string, or URLSearchParams.
 *
 * @example
 * buildQueryString({ foo: 'bar' }) // "foo=bar"
 * buildQueryString("foo=bar") // "foo=bar"
 * buildQueryString([["foo", "bar"]]) // "foo=bar"
 * buildQueryString(new URLSearchParams("foo=bar")) // "foo=bar"
 * buildQueryString(undefined) // ""
 * @param {string | Record<string, string> | string[][] | URLSearchParams | undefined} params
 * @returns {string}
 */
export declare const buildQueryString: (params: string | Record<string, string> | string[][] | URLSearchParams | undefined) => string;