code: func GetDynamicPluginProber(config persistentvolumeconfig.VolumeConfiguration) volume.DynamicPluginProber {
  	return flexvolume.GetDynamicPluginProber(config.FlexVolumePluginDir, exec.New() /*exec.Interface*/)
  }
docs: // GetDynamicPluginProber gets the probers of dynamically discoverable plugins
  // for the attach/detach controller.
  // Currently only Flexvolume plugins are dynamically discoverable.