func admissionHandler(w http.ResponseWriter, r *http.Request) { admissionReview := &admissionv1beta1.AdmissionReview{} decoder := codecs.NewDecoder(request.Body) _, _, err := decoder.Decode(request.Body, nil, admissionReview) if err != nil { // handle error } object := admissionReview.Request.Object // use object for validation or modification // get the UID of the object uid := object.GetUID() // get the name of the object name := object.GetName() // get the namespace of the object namespace := object.GetNamespace() // get the kind of the object kind := object.GetObjectKind().GroupVersionKind().Kind // get the API version of the object apiVersion := object.GetObjectKind().GroupVersionKind().Version // get the annotations of the object annotations := object.GetAnnotations() // get the labels of the object labels := object.GetLabels() // get any additional fields from the object fields := object.Object // perform validation or modification on the object // send the response back to Kubernetes API server admissionResponse := &admissionv1beta1.AdmissionResponse{} admissionResponse.Allowed = true admissionResponse.UID = admissionReview.Request.UID admissionReview.Response = admissionResponse data, err := json.Marshal(admissionReview) if err != nil { // handle error } w.WriteHeader(http.StatusOK) w.Write(data) }In this example, we are decoding an admission review request using a decoder object provided by the Kubernetes Go library. We then retrieve the object from the request using the `GetObject` function and perform validation or modification on the object. Finally, we send a response back to the Kubernetes API server indicating whether the admission request was allowed or not. The package library for this code example is `k8s.io/api/admission/v1beta1`.