code: func (r *Hook) ReportPanic() {
  	if p := recover(); p != nil {
  		if _, err := r.Client.Critical(fmt.Errorf("panic: %q", p), nil); err != nil {
  			fmt.Fprintf(os.Stderr, "reporting_panic=false err=%q\n", err)
  		}
  		panic(p)
  	}
  }
docs: // ReportPanic attempts to report the panic to rollbar using the provided
  // client and then re-panic. If it can't report the panic it will print an
  // error to stderr.