<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

## Forbid Extra Headers

In some special use cases (probably not very common), you might want to **restrict** the headers that you want to receive.

You can use Pydantic's model configuration to `forbid` any `extra` fields:

//// tab | Python 3.10+

```Python hl_lines="10"

			z.doDecommissionInRoutine(ctx, idx)
		}
	}()

	// Successfully started decommissioning.
	return nil
}

type decomError struct {
	Err string
}

func (d decomError) Error() string {
	return d.Err
}

type poolSpaceInfo struct {
	Free  int64
	Total int64
	Used  int64
}

// Tests check format xl value.
func TestCheckFormatErasureValue(t *testing.T) {
	testCases := []struct {
		format  *formatErasureV3
		success bool
	}{
		// Invalid Erasure format version "2".
		{
			&formatErasureV3{
				formatMetaV1: formatMetaV1{
					Version: "2",
					Format:  "Erasure",
				},
				Erasure: struct {
					Version          string     `json:"version"`
					This             string     `json:"this"`

package grid

import "strconv"

func _() {
	// An "invalid array index" compiler error signifies that the constant values have changed.
	// Re-run the stringer command to generate them again.
	var x [1]struct{}
	_ = x[handlerInvalid-0]
	_ = x[HandlerLockLock-1]
	_ = x[HandlerLockRLock-2]
	_ = x[HandlerLockUnlock-3]
	_ = x[HandlerLockRUnlock-4]
	_ = x[HandlerLockRefresh-5]
	_ = x[HandlerLockForceUnlock-6]

// data returned to just N bytes. Each call to Read
// updates N to reflect the new amount remaining.
// Read returns EOF when N <= 0 or when the underlying R returns EOF.
type HardLimitedReader struct {
	R io.Reader // underlying reader
	N int64     // max bytes remaining
}

func (l *HardLimitedReader) Read(p []byte) (n int, err error) {
	if l.N < 0 {
		return 0, ErrOverread
	}
	n, err = l.R.Read(p)

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package csv

import (
	"bytes"
	"io"
)

// recordTransform will convert records to always have newline records.
type recordTransform struct {
	reader io.Reader
	// recordDelimiter can be up to 2 characters.
	recordDelimiter []byte
	oneByte         []byte
	useOneByte      bool
}

func (rr *recordTransform) Read(p []byte) (n int, err error) {

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package disk

import (
	"os"
	"reflect"
	"testing"
)

func TestReadDriveStats(t *testing.T) {
	testCases := []struct {
		stat            string
		expectedIOStats IOStats
		expectErr       bool
	}{
		{

func isMeshed(pod *corev1.Pod) bool {
	return inject.FindSidecar(pod) != nil
}

// Extract value of key out of Struct, but always return a Struct, even if the value isn't one
func (v *myProtoValue) keyAsStruct(key string) *myProtoValue {
	if v == nil || v.GetStructValue() == nil {
		return asMyProtoValue(&structpb.Struct{Fields: make(map[string]*structpb.Value)})
	}

	return &myProtoValue{v.GetStructValue().Fields[key]}
}

package clause_test

import (
	"fmt"
	"testing"

	"gorm.io/gorm/clause"
)

func TestValues(t *testing.T) {
	results := []struct {
		Clauses []clause.Interface
		Result  string
		Vars    []interface{}
	}{
		{
			[]clause.Interface{
				clause.Insert{},
				clause.Values{
					Columns: []clause.Column{{Name: "name"}, {Name: "age"}},
					Values:  [][]interface{}{{"jinzhu", 18}, {"josh", 1}},
				},
			},

Adding new `global` values is discouraged as a general rule. The only exceptions are values that are frequently and consistently consumed across at least 2 charts (things like image tags, common labels, etc), but these would only be accepted on a strict case-by-case basis.

- If the change is to a Kubernetes field (such as modifying a Deployment attribute), it will likely need to be install-time configuration. However, that doesn't necessarily mean a PR to add a value will be accepted. The...