class ModelWithDatetimeField(BaseModel):
        dt_field: datetime

        @field_serializer("dt_field")
        def serialize_datetime(self, dt_field: datetime):
            return dt_field.replace(microsecond=0, tzinfo=timezone.utc).isoformat()

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

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

            apiChangesJsonFile: new File(testDir, 'test-api-changes.json').path,
            projectRootDir: testDir.path,
        ]
    }

    String replaceAsInternal(String name) {
        return name.replace('gradlebuild', 'gradlebuild.internal')
    }

            )
            if (
                param_type == ParamTypes.header
                and name == param.name
                and convert_underscores
            ):
                name = param.name.replace("_", "-")

            parameter = {
                "name": name,
                "in": param_type.value,
                "required": param.required,
                "schema": param_schema,
            }

    class ModelWithCustomEncoder(BaseModel):
        dt_field: datetime

        @field_serializer("dt_field")
        def serialize_dt_field(self, dt):
            return dt.replace(microsecond=0, tzinfo=timezone.utc).isoformat()

    class ModelWithCustomEncoderSubclass(ModelWithCustomEncoder):
        pass

    model = ModelWithCustomEncoder(dt_field=datetime(2019, 1, 1, 8))

    # Get Depends from type annotation
    if depends is not None and depends.dependency is None:
        # Copy `depends` before mutating it
        depends = copy(depends)
        depends = dataclasses.replace(depends, dependency=type_annotation)

    # Handle non-param type annotations like Request
    if lenient_issubclass(
        type_annotation,
        (
            Request,
            WebSocket,

        »»»

    Do NOT translate with (German) – notice the added period:

        «««
        ## Ein weiteres Modul mit `APIRouter`. { #another-module-with-apirouter }
        »»»

3) Replace occurrences of literal « - » (a space followed by a hyphen followed by a space) with « – » (a space followed by a dash followed by a space) in the translated part of the heading.

Example:

    Source (English):

    assert str(path).startswith(str(en_docs_path)), (
        f"Path must be inside {en_docs_path}"
    )
    lang_docs_path = Path(f"docs/{lang}/docs")
    out_path = Path(str(path).replace(str(en_docs_path), str(lang_docs_path)))
    return out_path


def generate_en_path(*, lang: str, path: Path) -> Path:
    en_docs_path = Path("docs/en/docs")

        # Ref: https://github.com/pydantic/pydantic/blob/d61792cc42c80b13b23e3ffa74bc37ec7c77f7d1/pydantic/schema.py#L207
        json_schema["title"] = field.field_info.title or field_alias.title().replace(
            "_", " "
        )
    return json_schema


def get_definitions(
    *,
    fields: Sequence[ModelField],
    model_name_map: ModelNameMap,

* 🐛 Fix internal Pydantic v1 compatibility (warnings) for Python 3.14 and Pydantic 2.12.1. PR [#14186](https://github.com/fastapi/fastapi/pull/14186) by [@svlandeg](https://github.com/svlandeg).

### Docs

* 📝 Replace `starlette.io` by `starlette.dev` and `uvicorn.org` by `uvicorn.dev`. PR [#14176](https://github.com/fastapi/fastapi/pull/14176) by [@Kludex](https://github.com/Kludex).

### Internal

        lifespan: Annotated[
            Optional[Lifespan[Any]],
            Doc(
                """
                A `Lifespan` context manager handler. This replaces `startup` and
                `shutdown` functions with a single context manager.

                Read more in the
                [FastAPI docs for `lifespan`](https://fastapi.tiangolo.com/advanced/events/).