code: func getNotReadyNodes(nodes []v1.Node) []string {
  	notReadyNodes := []string{}
  	for _, node := range nodes {
  		for _, condition := range node.Status.Conditions {
  			if condition.Type == v1.NodeReady && condition.Status != v1.ConditionTrue {
  				notReadyNodes = append(notReadyNodes, node.ObjectMeta.Name)
  			}
  		}
  	}
  	return notReadyNodes
  }
docs: // getNotReadyNodes returns a string slice of nodes in the cluster that are NotReady