llmClientManager.generateUnclearIntentResponse(userMessage, history, (chunk, done) -> {
                    fullResponse.append(chunk);
                    callback.onChunk(chunk, done);
                });
                callback.onPhaseComplete(ChatPhaseCallback.PHASE_ANSWER);
                if (logger.isDebugEnabled()) {

```Python
say_hi(name=None)  # Это работает, None допустим 🎉
```

Хорошая новость: в большинстве случаев вы сможете просто использовать `|` для объявления объединений типов:

```python
def say_hi(name: str | None):
    print(f"Hey {name}!")
```

        data, or by relaxing `Input` shape assumptions (note that you can pass
        shapes with `None` entries for axes that are meant to be dynamic). You
        can also disable the input checking entirely by setting
        `model.input_spec = None`.
    *   Several changes have been made to
        `tf.keras.mixed_precision.experimental`. Note that it is now recommended
        to use the non-experimental `tf.keras.mixed_precision` API.

from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI()


@dataclass
class Item:
    name: str
    date: datetime
    price: float | None = None
    owner_ids: list[int] | None = None


@app.get("/items/valid", response_model=Item)
def get_valid():
    return {"name": "valid", "date": datetime(2021, 7, 26), "price": 1.0}


@app.get("/items/object", response_model=Item)

from fastapi import FastAPI
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float | None = None
    owner_ids: list[int] | None = None


@app.get("/items/valid", response_model=Item)
def get_valid():
    return {"name": "valid", "price": 1.0}


@app.get("/items/coerce", response_model=Item)
def get_coerce():

```Python
say_hi(name=None)  # Bu çalışır, None geçerlidir 🎉
```

İyi haber şu ki, çoğu durumda tip birliklerini (union) tanımlamak için doğrudan `|` kullanabilirsiniz:

```python
def say_hi(name: str | None):
    print(f"Hey {name}!")
```

// Returns nil if the bytes are invalid or empty.
// AppendTo() can append a serialized Checksum to another already-serialized Checksum,
// however, in practice, we only use one at a time.
// ChecksumFromBytes only returns the first one and no part checksums.
func ChecksumFromBytes(b []byte) *Checksum {
	if len(b) == 0 {
		return nil
	}

	// Read checksum type
	t, n := binary.Uvarint(b)
	if n <= 0 {

		}
		if err != nil && !isErrVersionNotFound(err) && !isErrObjectNotFound(err) {
			return nil, err
		}

		// if object doesn't exist return error for If-Match conditional requests
		// If-None-Match should be allowed to proceed for non-existent objects
		if err != nil && opts.HasIfMatch && (isErrObjectNotFound(err) || isErrVersionNotFound(err)) {
			return nil, err
		}
	}

	userDefined := cloneMSS(opts.UserDefined)

O parâmetro `name` continua obrigatório (não é opcional) porque não tem valor padrão. Ainda assim, `name` aceita `None` como valor:

```Python
say_hi(name=None)  # Isso funciona, None é válido 🎉
```

A boa notícia é que, na maioria dos casos, você poderá simplesmente usar `|` para definir uniões de tipos:

```python
def say_hi(name: str | None):
    print(f"Hey {name}!")
```

	// than failing with UnknownAPIRequest we simply handle it for now.
	apiRouter.Methods(http.MethodGet).Path(SlashSeparator + SlashSeparator).
		HandlerFunc(s3APIMiddleware(api.ListBucketsHandler))

	// If none of the routes match add default error handler routes
	apiRouter.NotFoundHandler = collectAPIStats("notfound", httpTraceAll(errorResponseHandler))