)
from .shared import (
    is_uploadfile_sequence_annotation as is_uploadfile_sequence_annotation,
)
from .shared import lenient_issubclass as lenient_issubclass
from .shared import sequence_types as sequence_types
from .shared import value_is_sequence as value_is_sequence
from .v2 import ModelField as ModelField

) -> bool | None:
    if lenient_issubclass(type_annotation, Request):
        dependant.request_param_name = param_name
        return True
    elif lenient_issubclass(type_annotation, WebSocket):
        dependant.websocket_param_name = param_name
        return True
    elif lenient_issubclass(type_annotation, HTTPConnection):
        dependant.http_connection_param_name = param_name

    if origin is not None:
        for arg in get_args(annotation):
            if lenient_issubclass(arg, (BaseModel, Enum)):
                if arg not in known_models:
                    known_models.add(arg)  # type: ignore[arg-type]  # ty: ignore[unused-ignore-comment]
                    if lenient_issubclass(arg, BaseModel):
                        get_flat_models_from_model(arg, known_models=known_models)

from fastapi import routing
from fastapi._compat import (
    ModelField,
    get_definitions,
    get_flat_models_from_fields,
    get_model_name_map,
    get_schema_from_model_field,
    lenient_issubclass,
)
from fastapi.datastructures import DefaultPlaceholder, _Unset
from fastapi.dependencies.models import Dependant
from fastapi.dependencies.utils import (
    _get_flat_fields_from_params,
    get_flat_dependant,

                    if (
                        isinstance(response_class, DefaultPlaceholder)
                        or lenient_issubclass(response_class, EventSourceResponse)
                    ) and not lenient_issubclass(stream_item, ServerSentEvent):
                        self.stream_item_type = stream_item
                    response_model = None
                else:

## 0.128.4 (2026-02-07)

### Refactors

* ♻️ Refactor internals, simplify Pydantic v2/v1 utils, `create_model_field`, better types for `lenient_issubclass`. PR [#14860](https://github.com/fastapi/fastapi/pull/14860) by [@tiangolo](https://github.com/tiangolo).