/**
 * Stringがキーで、存在しないキーにアクセスする(get)と例外を投げるマップです。
 *
 * @author higa
 */
public class BeanMap extends LinkedHashMap<String, Object> {

    private static final long serialVersionUID = 1;

    @Override
    public Object get(final Object key) {
        if (!containsKey(key)) {
            throw new IllegalKeyOfBeanMapException(key, this);
        }
        return super.get(key);

 *
 * @since 4.0.0
 */
@Experimental
public class ArtifactDeployerException extends MavenException {

    /**
     *
     */
    @Serial
    private static final long serialVersionUID = 7421964724059077698L;

    /**
     * @param message the message of the error
     * @param e {@link Exception}
     */
    public ArtifactDeployerException(String message, Exception e) {

/**
 * The Exception class thrown by {@link VersionParser}.
 *
 * @since 4.0.0
 */
@Experimental
public class VersionParserException extends MavenException {

    @Serial
    private static final long serialVersionUID = 1504740189114877333L;

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */
    public VersionParserException(String message, Exception e) {

import java.io.Serializable;

import org.codelibs.core.lang.StringUtil;

/**
 * @author shinsuke
 *
 */
public class RequestHeader implements Serializable {

    private static final long serialVersionUID = 1L;

    private String name;

    private String value;

    public RequestHeader(final String name, final String value) {
        this.name = name;
        this.value = value;
    }

        private Boolean explain;

        private Float minScore;

        private String preference;

        private String routing;

        private String searchType;

        private long timeoutInMillis = -1;

        private Boolean version;

        private Boolean seqNoAndPrimaryTerm = Boolean.TRUE;

        private int terminateAfter = 0;

    //                                                                        ============
    private static OptionalEntity<BadWord> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new BadWord()).map(entity -> {
                entity.setCreatedBy(username);

      public void tearDown() throws IOException {
        factory.tearDown();
      }
    };
  }

  public static ByteSourceFactory asSlicedByteSourceFactory(
      final ByteSourceFactory factory, final long off, final long len) {
    checkNotNull(factory);
    return new ByteSourceFactory() {
      @Override
      public ByteSource createSource(byte[] bytes) throws IOException {

---

Another useful case is when you want to have keys of another type (e.g., `int`).

That's what we are going to see here.

In this case, you would accept any `dict` as long as it has `int` keys with `float` values:

//// tab | Python 3.9+

```Python hl_lines="7"
{!> ../../docs_src/body_nested_models/tutorial009_py39.py!}
```

////

//// tab | Python 3.8+

    //                                                                        ============
    public static OptionalEntity<DuplicateHost> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new DuplicateHost()).map(entity -> {
                entity.setCreatedBy(username);

    //                                                                        ============

    public static OptionalEntity<KeyMatch> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:
            return OptionalEntity.of(new KeyMatch()).map(entity -> {
                entity.setCreatedBy(username);