public interface Foo<T1, T2> {

        /**
         * @param foo
         * @return T2
         */
        T2 foo(T1 foo);
    }

    /**
     *
     */
    public interface Bar extends Foo<Integer, Long> {
    }

    /**
     * @param <T1>
     * @param <T2>
     *
     */
    public interface Baz<T1, T2> {

        /**
         * @return T1
         */

```JSON
{
  "item": "The Foo Wrestlers"
}
```

Но если клиент запросит `http://example.com/items/bar` (несуществующий `item_id` `"bar"`), то он получит статус-код 404 (ошибка "не найдено") и JSON-ответ в виде:

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Подсказка

    new EqualsTester()
        .addEqualityGroup(
            Subscriber.create(bus, "foo", charAt), Subscriber.create(bus, "foo", charAt))
        .addEqualityGroup(Subscriber.create(bus, "bar", charAt))
        .addEqualityGroup(Subscriber.create(bus, "foo", concat))
        .testEquals();
  }

  private Method getTestSubscriberMethod(String name) {
    try {

    assertEquals("", Files.getFileExtension("blah."));
    assertEquals("", Files.getFileExtension(".blah."));
    assertEquals("", Files.getFileExtension("/foo.bar/blah"));
    assertEquals("", Files.getFileExtension("/foo/.bar/blah"));
  }

  public void testGetNameWithoutExtension() {
    assertEquals("", Files.getNameWithoutExtension(".txt"));

    val headers =
      Headers
        .Builder()
        .add("WWW-Authenticate", "Digest,,,, Basic ,,foo=bar,realm=\"myrealm\"")
        .build()
    val expectedAuthParams = mutableMapOf<String?, String>()
    expectedAuthParams["realm"] = "myrealm"
    expectedAuthParams["foo"] = "bar"
    assertThat(headers.parseChallenges("WWW-Authenticate")).containsExactly(
      Challenge("Digest", mapOf()),

      implements TestListGenerator<Entry<String, Integer>> {

    @Override
    public SampleElements<Entry<String, Integer>> samples() {
      return new SampleElements<>(
          mapEntry("foo", 5),
          mapEntry("bar", 3),
          mapEntry("baz", 17),
          mapEntry("quux", 1),
          mapEntry("toaster", -2));
    }

    @SuppressWarnings("unchecked")
    @Override

## Crie uma instância

Nós poderíamos criar uma instância desta classe com:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[18] *}

E deste modo nós podemos "parametrizar" a nossa dependência, que agora possui `"bar"` dentro dele, como o atributo `checker.fixed_content`.

## Utilize a instância como dependência

///

#### Data with values for fields with defaults { #data-with-values-for-fields-with-defaults }

But if your data has values for the model's fields with default values, like the item with ID `bar`:

```Python hl_lines="3  5"
{
    "name": "Bar",
    "description": "The bartenders",
    "price": 62,
    "tax": 20.2
}
```

they will be included in the response.

///

#### Dados com valores para campos com padrões

Mas se seus dados tiverem valores para os campos do modelo com valores padrões, como o item com ID `bar`:

```Python hl_lines="3 5"
{
"name": "Bar",
"description": "The bartenders",
"price": 62,
"tax": 20.2
}
```

eles serão incluídos na resposta.

#### Dados com os mesmos valores que os padrões

    @Override
    public SampleElements<Entry<String, Integer>> samples() {
      return new SampleElements<>(
          mapEntry("foo", 5),
          mapEntry("bar", 3),
          mapEntry("baz", 17),
          mapEntry("quux", 1),
          mapEntry("toaster", -2));
    }

    @SuppressWarnings("unchecked")
    @Override