newFunc := reflect.MakeFunc(hookType, func(args []reflect.Value) []reflect.Value {
			tfCopy.Call(args)
			return of.Call(args)
		})
		tv.Field(i).Set(newFunc)
	}
}

// DNSStartInfo contains information about a DNS request.
type DNSStartInfo struct {
	Host string
}

// DNSDoneInfo contains information about the results of a DNS lookup.
type DNSDoneInfo struct {

pkg net/http/httptrace, type DNSDoneInfo struct, Coalesced bool
pkg net/http/httptrace, type DNSDoneInfo struct, Err error
pkg net/http/httptrace, type DNSStartInfo struct
pkg net/http/httptrace, type DNSStartInfo struct, Host string
pkg net/http/httptrace, type GotConnInfo struct
pkg net/http/httptrace, type GotConnInfo struct, Conn net.Conn

		GotFirstResponseByte: func() { logf("first response byte") },
		PutIdleConn:          func(err error) { logf("PutIdleConn = %v", err) },
		DNSStart:             func(e httptrace.DNSStartInfo) { logf("DNS start: %+v", e) },
		DNSDone:              func(e httptrace.DNSDoneInfo) { logf("DNS done: %+v", e) },

		{"ContextClientTrace", Func, 7},
		{"DNSDoneInfo", Type, 7},
		{"DNSDoneInfo.Addrs", Field, 7},
		{"DNSDoneInfo.Coalesced", Field, 7},
		{"DNSDoneInfo.Err", Field, 7},
		{"DNSStartInfo", Type, 7},
		{"DNSStartInfo.Host", Field, 7},
		{"GotConnInfo", Type, 7},
		{"GotConnInfo.Conn", Field, 7},
		{"GotConnInfo.IdleTime", Field, 7},
		{"GotConnInfo.Reused", Field, 7},
		{"GotConnInfo.WasIdle", Field, 7},