_STREAM_ORIGINS = {
    AsyncIterable,
    AsyncIterator,
    AsyncGenerator,
    Iterable,
    Iterator,
    Generator,
}


def get_stream_item_type(annotation: Any) -> Any | None:
    origin = get_origin(annotation)
    if origin is not None and origin in _STREAM_ORIGINS:
        type_args = get_args(annotation)
        if type_args:

from fastapi.dependencies.utils import (
    _should_embed_body_fields,
    get_body_field,
    get_dependant,
    get_flat_dependant,
    get_parameterless_sub_dependant,
    get_stream_item_type,
    get_typed_return_annotation,
    solve_dependencies,
)
from fastapi.encoders import jsonable_encoder
from fastapi.exceptions import (
    EndpointContext,
    FastAPIError,
    RequestValidationError,