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import { MiddlewareHandlerContext } from "$fresh/server.ts";
export async function handler(_req: Request, ctx: MiddlewareHandlerContext) {  ctx.state.layer3 = "layer3_mw";  const resp = await ctx.next();  resp.headers.set("server", "fresh test server layer3");  resp.headers.set("layer3", "fresh test server layer3");  return resp;}