origin = get_origin(annotation)
    if origin is Union or origin is UnionType:
        for arg in get_args(annotation):
            if field_annotation_is_sequence(arg):
                return True
        return False
    return _annotation_is_sequence(annotation) or _annotation_is_sequence(
        get_origin(annotation)
    )


def value_is_sequence(value: Any) -> bool:

    origin_type = get_origin(field.field_info.annotation) or field.field_info.annotation
    if origin_type is Union or origin_type is UnionType:  # Handle optional sequences
        union_args = get_args(field.field_info.annotation)
        for union_arg in union_args:
            if union_arg is type(None):
                continue
            origin_type = get_origin(union_arg) or union_arg
            break

    UploadFile,
)
from starlette.requests import HTTPConnection, Request
from starlette.responses import Response
from starlette.websockets import WebSocket
from typing_extensions import Literal, get_args, get_origin

multipart_not_installed_error = (
    'Form data requires "python-multipart" to be installed. \n'
    'You can install "python-multipart" with: \n\n'
    "pip install python-multipart\n"
)