app = FastAPI()
    model = ModelWithDatetimeField(dt_field=datetime(2019, 1, 1, 8))

    @app.get("/model", response_model=ModelWithDatetimeField)
    def get_model():
        return model

    client = TestClient(app)
    with client:
        response = client.get("/model")
    assert response.json() == {"dt_field": "2019-01-01T08:00:00+00:00"}

from fastapi import FastAPI


class ModelName(str, Enum):
    alexnet = "alexnet"
    resnet = "resnet"
    lenet = "lenet"


app = FastAPI()


@app.get("/models/{model_name}")
async def get_model(model_name: ModelName):
    if model_name is ModelName.alexnet:
        return {"model_name": model_name, "message": "Deep Learning FTW!"}

    if model_name.value == "lenet":

        if not name.endswith("A"):
            raise ValueError("name must end in A")
        return name


async def get_model_c() -> ModelC:
    return ModelC(username="test-user", password="test-password")


@app.get("/model/{name}", response_model=ModelA)
async def get_model_a(name: str, model_c=Depends(get_model_c)):

                raise ValueError("name must end in A")
            return name

    async def get_model_c() -> ModelC:
        return ModelC(username="test-user", password="test-password")

    @app.get("/model/{name}", response_model=ModelA)
    async def get_model_a(name: str, model_c=Depends(get_model_c)):
        return {"name": name, "description": "model-a-desc", "foo": model_c}

    client = TestClient(app)

        testInheritance(baseName, true);
    }

    public void testInheritance(String baseName, boolean fromRepo) throws IOException {
        Model parent = getModel(baseName + "-parent");

        Model child = getModel(baseName + "-child");

        if (fromRepo) {
            // when model is read from repo, a stream is used, then pomFile == null

    }

    @Nonnull
    @Override
    public Packaging getPackaging() {
        return packaging;
    }

    @Nonnull
    @Override
    public Model getModel() {
        return project.getModel().getDelegate();
    }

    @Nonnull
    @Override
    public Path getPomPath() {
        return nonNull(project.getFile(), "pomPath").toPath();
    }

    @Override

        return delegate;
    }

    @Override
    public Plugin getPlugin() {
        return new Plugin() {
            @Override
            public org.apache.maven.api.model.Plugin getModel() {
                return delegate.getPlugin().getDelegate();
            }

            @Override
            public PluginDescriptor getDescriptor() {

    @Nonnull
    List<ProducedArtifact> getArtifacts();

    /**
     * Returns the project model.
     */
    @Nonnull
    Model getModel();

    /**
     * Shorthand method.
     */
    @Nonnull
    default Build getBuild() {
        Build build = getModel().getBuild();
        return build != null ? build : Build.newInstance();
    }

    /**

            model = model.withPomFile(((FileModelSource) modelSource).getPath());
        }

        Model retModel = new Model(model);

        problems.setSource(retModel);

        modelValidator.validateFileModel(retModel, request, problems);

        if (hasFatalErrors(problems)) {
            throw problems.newModelBuildingException();
        }

    /**
     * Gets the model being built. The precise state of this model depends on the event being fired.
     *
     * @return The model being built, never {@code null}.
     */
    Model getModel();

    /**
     * Gets the model building request being processed.
     *
     * @return The model building request being processed, never {@code null}.
     */
    ModelBuildingRequest getRequest();