// Default constructor
    }

    /**
     * Enable or disable incremental crawling.
     * When enabled, only new or modified documents are crawled.
     */
    @Size(max = 10)
    public String incrementalCrawling;

    /**
     * Number of days to keep crawled documents before cleanup.
     * Set to -1 to disable automatic cleanup.
     */
    @Required
    @Min(-1)
    @Max(1000)

## Disable Syntax Highlighting { #disable-syntax-highlighting }

For example, you could disable syntax highlighting in Swagger UI.

Without changing the settings, syntax highlighting is enabled by default:

<img src="/img/tutorial/extending-openapi/image02.png">

But you can disable it by setting `syntaxHighlight` to `False`:

## Sobrescribir dependencias durante las pruebas { #overriding-dependencies-during-testing }

Hay algunos escenarios donde podrías querer sobrescribir una dependencia durante las pruebas.

No quieres que la dependencia original se ejecute (ni ninguna de las sub-dependencias que pueda tener).

This could be useful if for example you live in a country that restricts some URLs.

### Disable the automatic docs { #disable-the-automatic-docs }

The first step is to disable the automatic docs, as by default, those use the default CDN.

To disable them, set their URLs to `None` when creating your `FastAPI` app:

{* ../../docs_src/custom_docs_ui/tutorial001_py39.py hl[8] *}

#   MAVEN_ARGS          (Optional) Arguments passed to Maven before CLI arguments.
#   MAVEN_OPTS          (Optional) Java runtime options used when Maven is executed.
#   MAVEN_SKIP_RC       (Optional) Flag to disable loading of mavenrc files.
#   MAVEN_DEBUG_OPTS    (Optional) Specify the debug options to use. Default value is "-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=${MAVEN_DEBUG_ADDRESS}" when --debug is used

If you want to disable the OpenAPI schema completely you can set `openapi_url=None`, that will also disable the documentation user interfaces that use it.

## Docs URLs { #docs-urls }

You can configure the two documentation user interfaces included:

* **Swagger UI**: served at `/docs`.
    * You can set its URL with the parameter `docs_url`.
    * You can disable it by setting `docs_url=None`.

# Conditional OpenAPI { #conditional-openapi }

If you needed to, you could use settings and environment variables to configure OpenAPI conditionally depending on the environment, and even disable it entirely.

## About security, APIs, and docs { #about-security-apis-and-docs }

Hiding your documentation user interfaces in production *shouldn't* be the way to protect your API.

    assert response.json() == {
        "detail": [
            {
                "type": "int_parsing",
                "loc": ["path", "item_id"],
                "msg": "Input should be a valid integer, unable to parse string as an integer",
                "input": "foobar",
            }
        ]
    }


def test_path_int_True():
    response = client.get("/path/int/True")
    assert response.status_code == 422

    assert response.json() == {
        "detail": [
            {
                "type": "int_parsing",
                "loc": ["query", "query"],
                "msg": "Input should be a valid integer, unable to parse string as an integer",
                "input": "42.5",
            }
        ]
    }


def test_query_int_query_baz():
    response = client.get("/query/int?query=baz")

Você provavelmente pode pular esta parte.

///

Existe uma forma alternativa de definir essa lógica para ser executada durante a *inicialização* e durante o *encerramento*.

Você pode definir manipuladores de eventos (funções) que precisam ser executados antes de a aplicação iniciar ou quando a aplicação estiver encerrando.