You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: trace.go
    path of file: ./repos/buildkit/vendor/golang.org/x/net/trace
    
    the code of the file until where you have to start completion: // Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style

    
func init() {
	_, pat := http.DefaultServeMux.Handler(&http.Request{URL: &url.URL{Path: debugRequestsPath}})
	if pat == debugRequestsPath {
		panic("/debug/requests is already registered. You may have two independent copies of " +
			"golang.org/x/net/trace in your binary, trying to maintain separate state. This may " +
			"involve a vendored copy of golang.org/x/net/trace.")
	}

	// TODO(jbd): Serve Traces from /debug/traces in the future?
	// There is no requirement for a request to be present to have traces.
	http.HandleFunc(debugRequestsPath, Traces)
	http.HandleFunc(debugEventsPath, Events)
}