Serve.FetchOrRoutes

type FetchOrRoutes<WebSocketData, R extends string> = { routes: Routes<WebSocketData, R>; fetch(this: Server<WebSocketData>, req: Request, server: Server<WebSocketData>): MaybePromise<Response> } | { routes: Routes<WebSocketData, R>; fetch(this: Server<WebSocketData>, req: Request, server: Server<WebSocketData>): MaybePromise<Response> }