code: func (mp *MultipointExample) Prebind(pc *framework.PluginContext, pod *v1.Pod, nodeName string) *framework.Status {
  	mp.numRuns++
  	if pod == nil {
  		return framework.NewStatus(framework.Error, "pod must not be nil")
  	}
  	return nil
  }
docs: // Prebind is the functions invoked by the framework at "prebind" extension point.