export function A(param: string): void export function A(param: { param: string, otherProp?: string }): void export function A(paramOrObj: string | { param: string, otherProp?: string } = { param: "initial"}): void {

async function createRequest( url: URL | string, { az, queries, ...parameters }: Params & { az: "text" } ): Promise<string>; async function createRequest<R>( url: URL | string, { az, queries, ...parameters }: Params & { az?: "json" } ): Promise<R>; async function createRequest<R>( url: URL | string, { az, queries, ...parameters }: Params ): Promise<R | string> {

    bar: {        (s: string): number;        (n: number): string;    }