code: func (util *portworxVolumeUtil) AttachVolume(m *portworxVolumeMounter, attachOptions map[string]string) (string, error) {
  	driver, err := util.getLocalPortworxDriver(m.plugin.host)
  	if err != nil || driver == nil {
  		klog.Errorf("Failed to get portworx driver. Err: %v", err)
  		return "", err
  	}
  
  	devicePath, err := driver.Attach(m.volName, attachOptions)
  	if err != nil {
  		klog.Errorf("Error attaching Portworx Volume (%v): %v", m.volName, err)
  		return "", err
  	}
  	return devicePath, nil
  }
docs: // AttachVolume attaches a Portworx Volume