Imports k8s.io/api/core/v1 k8s.io/apimachinery/pkg/apis/meta/v1 k8s.io/apimachinery/pkg/runtime k8s.io/apimachinery/pkg/runtime/schema knative.dev/eventing/pkg/apis/sources knative.dev/pkg/apis knative.dev/pkg/apis/duck/v1 knative.dev/pkg/webhook/resourcesemantics Standard library imports context fmt