// WriteBytes writes bytes to the buffer, and terminates with newline.
	WriteBytes(bytes []byte)

	// Reset clears the buffer
	Reset()

	// Bytes returns the contents of the buffer as a []byte
	Bytes() []byte

	// String returns the contents of the buffer as a string
	String() string

	// Lines returns the number of lines in the buffer. Note that more precisely, this

	"k8s.io/kubernetes/cmd/kubeadm/app/util/output"
)

func createTestRunDiffFile(contents []byte) (string, error) {
	file, err := os.CreateTemp("", "kubeadm-upgrade-diff-config-*.yaml")
	if err != nil {
		return "", errors.Wrap(err, "failed to create temporary test file")
	}
	if _, err := file.Write(contents); err != nil {
		return "", errors.Wrap(err, "failed to write to temporary test file")
	}

					"key": "b",
					"val": 2,
				},
				map[string]interface{}{
					"key": "a",
					"val": 1,
				},
			}, &mapListSchema),
			equal: true,
		},
		{
			name: "map lists are not equal if contents differs",
			lhs: UnstructuredToVal([]interface{}{
				map[string]interface{}{
					"key": "a",
					"val": 1,
				},
				map[string]interface{}{
					"key": "b",
					"val": 2,
				},

	// AddressTypeFQDN represents a FQDN.
	AddressTypeFQDN = AddressType("FQDN")
)

// Endpoint represents a single logical "backend" implementing a service.
type Endpoint struct {
	// addresses of this endpoint. The contents of this field are interpreted
	// according to the corresponding EndpointSlice addressType field. Consumers
	// must handle different types of addresses in the context of their own

		errs = append(errs, errors.Wrap(err, "error writing kubelet configuration to file"))
	}

	if dryRun { // Print what contents would be written
		err := dryrunutil.PrintDryRunFile(kubeadmconstants.KubeletConfigurationFileName, kubeletDir, kubeadmconstants.KubeletRunDirectory, os.Stdout)
		if err != nil {

	getAttrsFunc func(runtime.Object) (labels.Set, fields.Set, error)

	// cache is used a cyclic buffer - the "current" contents of it are
	// stored in [start_index%capacity, end_index%capacity) - so the
	// "current" contents have exactly end_index-start_index items.
	cache      []*watchCacheEvent
	startIndex int
	endIndex   int

	// remounted to reflect changes in the referencing pod. Atomically updating
	// volumes, depend on this to update the contents of the volume.
	// All volume mounting calls should be idempotent so a second mount call for
	// volumes that do not need to update contents should not fail.

			Any unmarshaling problems such as unknown API fields will trigger errors. Unknown API versions and
			fields with invalid values will also trigger errors. Any other errors or warnings may be reported
			depending on contents of the input file.

			In this version of kubeadm, the following API versions are supported:
			- %s
		`), kubeadmapiv1old.SchemeGroupVersion),
		RunE: func(cmd *cobra.Command, args []string) error {

  // If the provisioner or an external controller can support the specified data source,
  // it will create a new volume based on the contents of the specified data source.
  // When the AnyVolumeDataSource feature gate is enabled, dataSource contents will be copied to dataSourceRef,
  // and dataSourceRef contents will be copied to dataSource when dataSourceRef.namespace is not specified.

}

// Check validates if the given file contains the given content.
func (fcc FileContentCheck) Check() (warnings, errorList []error) {
	klog.V(1).Infof("validating the contents of file %s", fcc.Path)
	f, err := os.Open(fcc.Path)
	if err != nil {
		return nil, []error{errors.Errorf("%s does not exist", fcc.Path)}
	}

	lr := io.LimitReader(f, int64(len(fcc.Content)))
	defer f.Close()