code: func (c *Gcd) ConnectToInstance(host string, port string) error {
  	c.host = host
  	c.port = port
  	c.addr = fmt.Sprintf("%s:%s", c.host, c.port)
  	c.apiEndpoint = fmt.Sprintf("http://%s/json", c.addr)
  
  	var err error
  	go func(err error) {
  		err = c.probeDebugPort()
  	}(err)
  	<-c.readyCh
  
  	return err
  }
docs: // ConnectToInstance connects to a running chrome instance without starting a local process
  // Host - The host destination.
  // Port - The port to listen on.