code: func (t *BTTracer) Finalize(options []string) *exec.Cmd {
  	t.m.RLock()
  	defer t.m.RUnlock()
  
  	tracer := exec.Command(t.cmd, options...)
  	tracer.Dir = t.outputDir
  	tracer.Stdin = t.p.stdin
  	tracer.Stderr = t.p.stderr
  
  	t.Logf(LogDebug, "Command: %v\n", tracer)
  
  	return tracer
  }
docs: // See bcd.Tracer.Finalize().