code: func (t *trace) LazyLog(x fmt.Stringer, sensitive bool) {
  	Log.Println(logMessageWithTrace(t, x.String()))
  	t.trace.LazyLog(x, sensitive)
  }
docs: // LazyLog adds x to the event log. It will be evaluated each time the
  // /debug/requests page is rendered. Any memory referenced by x will be
  // pinned until the trace is finished and later discarded.