<version>4.0.0+</version>
          <required>false</required>
          <description>Default dependency information for projects that inherit from this one. The
            dependencies in this section are not immediately resolved. Instead, when a POM derived
            from this one declares a dependency described by a matching groupId and artifactId, the

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testRetainAll_subset() {
    expectReturnsTrue(nonEmptyProperSubset);
    expectContents(nonEmptyProperSubset.toRetain);
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testRetainAll_subsetUnsupported() {
    expectThrows(nonEmptyProperSubset);

                new RequestParam[] { RequestParam.NONE, RequestParam.NO_TIMEOUT, RequestParam.NO_RETRY, RequestParam.RETAIN_PAYLOAD },
                values, "values() order should match declaration order");
    }

    // Happy path: valueOf resolves each constant name; toString equals name; ordinal is stable
    @ParameterizedTest
    @ValueSource(strings = { "NONE", "NO_TIMEOUT", "NO_RETRY", "RETAIN_PAYLOAD" })

The zoneinfo.zip archive contains time zone files compiled using
the code and data maintained as part of the IANA Time Zone Database.
The IANA asserts that the database is in the public domain.

For more information, see
https://www.iana.org/time-zones
ftp://ftp.iana.org/tz/code/tz-link.html
https://datatracker.ietf.org/doc/html/rfc6557

		for _, freeVersion := range fivs.FreeVersions {
			oi := freeVersion.ToObjectInfo(item.bucket, item.objectPath(), versioned)
			done := globalScannerMetrics.time(scannerMetricTierObjSweep)
			globalExpiryState.enqueueFreeVersion(oi)
			done()
		}

		// These are rather expensive. Skip if nobody listens.
		if globalTrace.NumSubscribers(madmin.TraceScanner) > 0 {
			if len(fivs.FreeVersions) > 0 {

  public void testOf() {
    assertMapEquals(ImmutableMap.of("one", 1), "one", 1);
    assertMapEquals(ImmutableMap.of("one", 1, "two", 2), "one", 1, "two", 2);
    assertMapEquals(
        ImmutableMap.of("one", 1, "two", 2, "three", 3), "one", 1, "two", 2, "three", 3);
    assertMapEquals(
        ImmutableMap.of("one", 1, "two", 2, "three", 3, "four", 4),
        "one",
        1,
        "two",
        2,
        "three",

```sh
firewall-cmd --get-active-zones
```

This command gets the active zone(s). Now, apply port rules to the relevant zones returned above. For example if the zone is `public`, use

```sh
firewall-cmd --zone=public --add-port=9000/tcp --permanent
```

> [!NOTE]

👉 💼, 👆 💪 ❎ 📨 🏷 ⚡ ⚒ `response_model=None`:

{* ../../docs_src/response_model/tutorial003_05.py hl[9] *}

👉 🔜 ⚒ FastAPI 🚶 📨 🏷 ⚡ & 👈 🌌 👆 💪 ✔️ 🙆 📨 🆎 ✍ 👆 💪 🍵 ⚫️ 🤕 👆 FastAPI 🈸. 👶

## 📨 🏷 🔢 🔢

👆 📨 🏷 💪 ✔️ 🔢 💲, 💖:

{* ../../docs_src/response_model/tutorial004.py hl[11,13:14] *}

* `description: Union[str, None] = None` (⚖️ `str | None = None` 🐍 3️⃣.1️⃣0️⃣) ✔️ 🔢 `None`.

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):

`Optional[Something]` é na verdade um atalho para `Union[Something, None]`, eles são equivalentes.

Isso também significa que no Python 3.10, você pode utilizar `Something | None`:

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```