code: func GetDynamicPluginProber(pluginDir string, runner exec.Interface) volume.DynamicPluginProber {
  	return flexvolume.GetDynamicPluginProber(pluginDir, runner)
  }
docs: // GetDynamicPluginProber gets the probers of dynamically discoverable plugins
  // for kubelet.
  // Currently only Flexvolume plugins are dynamically discoverable.