```Python hl_lines="15"
{!> ../../docs_src/body_nested_models/tutorial008.py!}
```

////

## Editor support everywhere

And you get editor support everywhere.

Even for items inside of lists:

<img src="/img/tutorial/body-nested-models/image01.png">

You couldn't get this kind of editor support if you were working directly with `dict` instead of Pydantic models.

		return strings.ToUpper(h.Get(xhttp.AmzServerSideEncryption)) != xhttp.AmzEncryptionAES
	}
	return false
}

// ParseHTTP parses the SSE-KMS headers and returns the SSE-KMS key ID
// and the KMS context on success.
func (ssekms) ParseHTTP(h http.Header) (string, kms.Context, error) {
	if h == nil {
		return "", nil, ErrInvalidEncryptionMethod
	}

	algorithm := h.Get(xhttp.AmzServerSideEncryption)

    "bar": {"id": "bar", "title": "Bar", "description": "The bartenders"},
}

app = FastAPI()


class Item(BaseModel):
    id: str
    title: str
    description: str | None = None


@app.get("/items/{item_id}", response_model=Item)
async def read_main(item_id: str, x_token: Annotated[str, Header()]):
    if x_token != fake_secret_token:
        raise HTTPException(status_code=400, detail="Invalid X-Token header")

    public ActionResponseCredential(final Supplier<ActionResponse> action) {
        this.action = action;
    }

    public ActionResponse execute() {
        return action.get();
    }

    for (Class<?> cls : classes) {
      Optional<String> testedClassName = TEST_SUFFIX.chop(cls.getName());
      if (testedClassName.isPresent()) {
        Class<?> testedClass = classMap.get(testedClassName.get());
        if (testedClass != null) {
          testClasses.put(testedClass, cls);
        }
      } else {
        candidateClasses.add(cls);
      }
    }

        ImmutableBiMap.copyOf(ImmutableMap.of("one", 1, "two", 2));
    ImmutableBiMap<String, Integer> copy = SerializableTester.reserializeAndAssert(bimap);
    assertEquals(Integer.valueOf(1), copy.get("one"));
    assertEquals("one", copy.inverse().get(1));
    assertSame(copy, copy.inverse().inverse());
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testInverseSerialization() {

        result.set(t.getGenericComponentType());
      }

      @Override
      void visitClass(Class<?> t) {
        result.set(t.getComponentType());
      }
    }.visit(type);
    return result.get();
  }

  /**
   * Returns {@code ? extends X} if any of {@code bounds} is a subtype of {@code X[]}; or null
   * otherwise.
   */
  @CheckForNull

}

// Get extracts and parses an ETag from the given HTTP headers.
// It returns an error when the HTTP headers do not contain
// an ETag entry or when the ETag is malformed.
//
// Get only accepts AWS S3 compatible ETags - i.e. no
// encrypted ETags - and therefore is stricter than Parse.
func Get(h http.Header) (ETag, error) {
	const strict = true
	if v := h.Get("Etag"); v != "" {

        };
    List<String> result = Resources.readLines(resource, US_ASCII, collectAndLowercaseAndTrim);
    assertEquals(3600, result.size());
    assertEquals("ALICE'S ADVENTURES IN WONDERLAND", result.get(0));
    assertEquals("THE END", result.get(result.size() - 1));
  }

  public void testCopyToOutputStream() throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();

// blocks until the mutex is available.
func (lm *LRWMutex) Lock() {
	const isWriteLock = true
	lm.lockLoop(context.Background(), lm.id, lm.source, math.MaxInt64, isWriteLock)
}

// GetLock tries to get a write lock on lm before the timeout occurs.
func (lm *LRWMutex) GetLock(ctx context.Context, id string, source string, timeout time.Duration) (locked bool) {
	const isWriteLock = true