modelProperties.put(REVISION_PROPERTY, request.getUserProperties().get(REVISION_PROPERTY));
        }
        if (request.getUserProperties().containsKey(CHANGELIST_PROPERTY)) {
            modelProperties.put(CHANGELIST_PROPERTY, request.getUserProperties().get(CHANGELIST_PROPERTY));
        }
        if (request.getUserProperties().containsKey(SHA1_PROPERTY)) {

            return (T) this;
        }

        final ComponentDef<?> componentDef = prototypeMap.get(name);
        if (componentDef != null) {
            return (T) componentDef.get();
        }
        final ComponentHolder<?> componentHolder = singletonMap.get(name);
        if (componentHolder != null) {
            return (T) componentHolder.get();
        }
        return null;
    }

    @Override

from fastapi import FastAPI, Path

app = FastAPI()


@app.get("/items/{item_id}")
async def read_items(
    *, item_id: int = Path(title="The ID of the item to get", ge=1), q: str
):
    results = {"item_id": item_id}
    if q:
        results.update({"q": q})

`@app.get("/")`は直下の関数が下記のリクエストの処理を担当することを**FastAPI**に伝えます:

* パス `/`
* <abbr title="an HTTP GET method"><code>get</code> オペレーション</abbr>

/// info | `@decorator` について

Pythonにおける`@something`シンタックスはデコレータと呼ばれます。

「デコレータ」は関数の上に置きます。かわいらしい装飾的な帽子のようです（この用語の由来はそこにあると思います）。

「デコレータ」は直下の関数を受け取り、それを使って何かを行います。

私たちの場合、このデコレーターは直下の関数が**オペレーション** `get`を使用した**パス**` / `に対応することを**FastAPI** に通知します。

    /**
     * The reserved id for Maven Central
     */
    String CENTRAL_ID = "central";

    /**
     * Gets the identifier of this repository.
     *
     * @return the (case-sensitive) identifier, never {@code null}
     */
    @Nonnull
    String getId();

    /**
     * Gets the type of the repository, for example "default".
     *
     * @return the (case-sensitive) type of the repository, never {@code null}

@Experimental
public interface ToolchainsBuilderRequest extends Request<ProtoSession> {

    /**
     * Gets the installation Toolchains source.
     *
     * @return the installation Toolchains source or {@code null} if none
     */
    @Nonnull
    Optional<Source> getInstallationToolchainsSource();

    /**
     * Gets the user Toolchains source.
     *
     * @return the user Toolchains source or {@code null} if none
     */

        assertEquals(
                "sources", target.getVersioning().getSnapshotVersions().get(0).getClassifier());
        assertEquals("jar", target.getVersioning().getSnapshotVersions().get(0).getExtension());
        assertEquals(
                "20200710072412",
                target.getVersioning().getSnapshotVersions().get(0).getUpdated());
    }

    @Test

   */
  @CanIgnoreReturnValue // TODO(b/27479612): consider removing this?
  V get(K key) throws ExecutionException;

  /**
   * Returns the value associated with {@code key} in this cache, first loading that value if
   * necessary. No observable state associated with this cache is modified until loading completes.
   * Unlike {@link #get}, this method does not throw a checked exception, and thus should only be

            headers=self.make_authenticate_headers(),
        )

    async def __call__(
        self, request: Request
    ) -> Optional[HTTPAuthorizationCredentials]:
        authorization = request.headers.get("Authorization")
        scheme, credentials = get_authorization_scheme_param(authorization)
        if not (authorization and scheme and credentials):
            if self.auto_error:

@callback_router.get(
    "{$callback_url}/callback/", responses={400: {"model": CustomModel}}
)
def callback_route():
    pass  # pragma: no cover


@app.post("/", callbacks=callback_router.routes)
def main_route(callback_url: HttpUrl):
    pass  # pragma: no cover


client = TestClient(app)


def test_openapi_schema():
    response = client.get("/openapi.json")