Imports k8s.io/client-go/rest knative.dev/serving/pkg/client/certmanager/clientset/versioned/typed/acme/v1alpha2 k8s.io/client-go/discovery knative.dev/serving/pkg/client/certmanager/clientset/versioned/typed/certmanager/v1alpha2 k8s.io/client-go/util/flowcontrol Standard library imports fmt