function defineLayoutimport { defineLayout } from "https://deno.land/x/fresh@1.6.3/server.ts"; defineLayout<T>(fn: (req: Request, ctx: RouteContext<void, T>) => ComponentChildren | Response | Promise<ComponentChildren | Response>): AsyncLayout<void, T>Type ParametersTParametersfn: (req: Request, ctx: RouteContext<void, T>) => ComponentChildren | Response | Promise<ComponentChildren | Response>ReturnsAsyncLayout<void, T>