import ( "net/http" go.miniprofiler_gae ) func handler(w http.ResponseWriter, r *http.Request) { ctx := appengine.NewContext(r) mp := miniprofiler.FromRequest(r) // Do some work and record steps with MiniProfiler. step := mp.Step("Doing some work") defer step.End() // Log an error along with profiling information. ctx.Errorf("An error occurred while doing some work: %v", err) // Write the response. w.Write([]byte("Hello, world!")) }In this example, we import the miniprofiler_gae package and define an HTTP handler that uses the package to profile an HTTP request. We get a context object from the GAE appengine package, and then get a MiniProfiler instance from the request using the miniprofiler.FromRequest function. We then do some work and record steps using MiniProfiler, and log an error using the Context Errorf function. Finally, we write a response to the client. Overall, the go.miniprofiler_gae package is a useful library for integrating MiniProfiler with GAE applications in Go, providing additional profiling and logging capabilities to help diagnose and debug errors.