type ReplicaModifications struct {
	Status Status `xml:"Status" json:"Status"`
}

// SourceSelectionCriteria - specifies additional source selection criteria in ReplicationConfiguration.
type SourceSelectionCriteria struct {
	ReplicaModifications ReplicaModifications `xml:"ReplicaModifications" json:"ReplicaModifications"`
}

// IsValid - checks whether SourceSelectionCriteria is valid or not.

                                    if subtype == "json" or subtype.endswith("+json"):
                                        json_body = await request.json()
                            if json_body != Undefined:
                                body = json_body
                            else:
                                body = body_bytes
            except json.JSONDecodeError as e:

      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Unauthorized request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Page not found
      content:
        application/json:
          schema:

🚥 👩‍💻 📨 `http://example.com/items/foo` ( `item_id` `"foo"`), 👈 👩‍💻 🔜 📨 🇺🇸🔍 👔 📟 2️⃣0️⃣0️⃣, & 🎻 📨:

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

✋️ 🚥 👩‍💻 📨 `http://example.com/items/bar` (🚫-🚫 `item_id` `"bar"`), 👈 👩‍💻 🔜 📨 🇺🇸🔍 👔 📟 4️⃣0️⃣4️⃣ ("🚫 🔎" ❌), & 🎻 📨:

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

/// tip

		"valid.yaml": validYAML,
	})

	tempDirJSON := createTestDirectory(t, map[string]string{
		"valid.json":       validJSON,
		"invalid.json":     invalidJSON,
		"warning.json":     warningsJSON,
		"invalidYAML.json": invalidJSON,
	})
	validTempDirJSON := createTestDirectory(t, map[string]string{
		"valid.json": validJSON,
	})

	t.Cleanup(func() {
		os.RemoveAll(tempDirYAML)
		os.RemoveAll(validTempDirYAML)

👆 🔜 🤚 👆 👩‍💻 📊, 💖:

```JSON
{
  "username": "johndoe",
  "email": "******@****.***",
  "full_name": "John Doe",
  "disabled": false,
  "hashed_password": "fakehashedsecret"
}
```

<img src="/img/tutorial/security/image06.png">

🚥 👆 🖊 🔒 ℹ &amp; ⏏, &amp; ⤴️ 🔄 🎏 🛠️ 🔄, 👆 🔜 🤚 🇺🇸🔍 4️⃣0️⃣1️⃣ ❌:

```JSON
{
  "detail": "Not authenticated"
}
```

	req.Header.Set("content-md5", "====test")
	jsonReq := dumpRequest(req)
	type jsonResult struct {
		Method     string      `json:"method"`
		RequestURI string      `json:"reqURI"`
		Header     http.Header `json:"header"`
	}
	res := jsonResult{}
	if err = json.Unmarshal([]byte(strings.ReplaceAll(jsonReq, "%%", "%")), &res); err != nil {
		t.Fatal(err)
	}

	// Look for expected method.

    response = client.get("/items/foo")
    assert response.status_code == 404, response.text
    assert response.json() == {"detail": "Item not found, there's only a plumbus here"}


def test_get(client: TestClient):
    response = client.get("/items/plumbus")
    assert response.status_code == 200, response.text
    assert response.json() == "plumbus"


def test_fastapi_error(client: TestClient):

    response = client.get("/items/foo")
    assert response.status_code == 404, response.text
    assert response.json() == {"detail": "Item not found, there's only a plumbus here"}


def test_get(client: TestClient):
    response = client.get("/items/plumbus")
    assert response.status_code == 200, response.text
    assert response.json() == "plumbus"


def test_internal_error(client: TestClient):

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Isso significa que ele **sempre terá um valor**, só que às vezes o valor pode ser `None` (ou `null` em termos de JSON).