///

```Python hl_lines="9"
{!> ../../docs_src/header_params/tutorial001.py!}
```

////

/// note | "Technical Details"

`Header` is a "sister" class of `Path`, `Query` and `Cookie`. It also inherits from the same common `Param` class.

But remember that when you import `Query`, `Path`, `Header`, and others from `fastapi`, those are actually functions that return special classes.

///

/// info

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * @author Keiichi Watanabe
 */
public class EditForm extends CreateForm {

    @Required
    @Size(max = 1000)
    public String id;

    @Size(max = 1000)
    public String updatedBy;

    @ValidateTypeFailure
    public Long updatedTime;

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * @author shinsuke
 */
public class EditForm extends CreateForm {

    @Required
    @Size(max = 1000)
    public String id;

    @Size(max = 1000)
    public String updatedBy;

    @ValidateTypeFailure
    public Long updatedTime;

import org.lastaflute.web.validation.Required;
import org.lastaflute.web.validation.theme.conversion.ValidateTypeFailure;

import jakarta.validation.constraints.Size;

/**
 * @author Keiichi Watanabe
 */
public class EditForm extends CreateForm {

    @Required
    @Size(max = 1000)
    public String id;

    @Size(max = 1000)
    public String updatedBy;

    @ValidateTypeFailure
    public Long updatedTime;

import com.google.common.collect.Multimap;

/**
 * Helper methods/assertions for use with {@code com.google.common.collect} types.
 *
 * @author Colin Decker
 */
@GwtCompatible
final class GoogleHelpers {

  private GoogleHelpers() {}

  static void assertEmpty(Multimap<?, ?> multimap) {
    if (!multimap.isEmpty()) {
      fail("Not true that " + multimap + " is empty");
    }
  }

import org.lastaflute.core.json.JsonMappingOption;
import org.lastaflute.core.json.JsonMappingOption.JsonFieldNaming;
import org.lastaflute.core.json.JsonResourceProvider;

public class FessJsonResourceProvider implements JsonResourceProvider {
    @Override
    public boolean isNullsSuppressed() {
        return true;
    }

    @Override
    public boolean isPrettyPrintSuppressed() {

 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import java.util.SortedMap;

@GwtCompatible
public class ImmutableSortedMapSubMapMapInterfaceTest
    extends AbstractImmutableSortedMapMapInterfaceTest<String, Integer> {
  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {

 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import java.util.SortedMap;

@GwtCompatible
public class ImmutableSortedMapTailMapMapInterfaceTest
    extends AbstractImmutableSortedMapMapInterfaceTest<String, Integer> {
  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {

import com.google.common.util.concurrent.AbstractFuture.TrustedFuture;

/**
 * Tests for {@link AbstractFuture} that use a non-{@link TrustedFuture} for {@link
 * AbstractFuture#setFuture} calls.
 */
@GwtCompatible
public class UntrustedInputFutureTest extends AbstractAbstractFutureTest {
  @Override
  AbstractFuture<Integer> newDelegate() {
    AbstractFuture<Integer> future = new AbstractFuture<Integer>() {};

 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import java.util.SortedMap;

@GwtCompatible
public class ImmutableSortedMapTailMapMapInterfaceTest
    extends AbstractImmutableSortedMapMapInterfaceTest<String, Integer> {
  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {