<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Luego, si vas a las URLs en `/openapi.json`, `/docs`, o `/redoc`, solo obtendrás un error `404 Not Found` como:

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

import groovy.transform.Immutable

@Immutable
class ApiChange {
    String type
    String member
    List<String> changes

    static ApiChange parse(Object json) {
        new ApiChange(json.type, json.member, json.changes ?: [])
    }

    String toString() {
        def formattedMember = member - "$type."
        "$type - $formattedMember - $changes"
    }

type PoolDecommissionInfo struct {
	StartTime   time.Time `json:"startTime" msg:"st"`
	StartSize   int64     `json:"startSize" msg:"ss"`
	TotalSize   int64     `json:"totalSize" msg:"ts"`
	CurrentSize int64     `json:"currentSize" msg:"cs"`

	Complete bool `json:"complete" msg:"cmp"`
	Failed   bool `json:"failed" msg:"fl"`
	Canceled bool `json:"canceled" msg:"cnl"`

	// Internal information.

	AccessKey    string         `xml:"AccessKeyId" json:"accessKey,omitempty" yaml:"accessKey"`
	SecretKey    string         `xml:"SecretAccessKey" json:"secretKey,omitempty" yaml:"secretKey"`
	SessionToken string         `xml:"SessionToken" json:"sessionToken,omitempty" yaml:"sessionToken"`
	Expiration   time.Time      `xml:"Expiration" json:"expiration" yaml:"-"`
	Status       string         `xml:"-" json:"status,omitempty"`

    assert response.json() == [
        {"name": "Foo", "description": "There comes my hero"},
        {"name": "Red", "description": "It's my aeroplane"},
    ]


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

    assert response.status_code == 404, response.text


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {},

    assert response.status_code == 200, response.text
    assert response.json() == {
        "sub_items": [{"name": "subitem", "sub_items": []}],
        "name": "item",
    }

    response = client.get("/items/recursive-submodel")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "name": "item",
        "sub_items1": [
            {

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

Esto significa que **siempre tendrá un valor**, solo que a veces el valor podría ser `None` (o `null` en JSON).

<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).

import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.JsonParser;
import com.google.api.client.json.JsonToken;
import com.google.api.client.json.gson.GsonFactory;
import com.google.common.io.BaseEncoding;
import com.google.common.io.BaseEncoding.DecodingException;