How to use the uvicorn.protocols.http.h11_impl.H11Protocol function in uvicorn

def test_concrete_http_class():
    config = Config(app=asgi_app, http=protocols.http.h11_impl.H11Protocol)
    config.load()
    assert config.http_protocol_class is protocols.http.h11_impl.H11Protocol

def test_concrete_http_class():
    config = Config(app=asgi_app, http=protocols.http.h11_impl.H11Protocol)
    config.load()
    assert config.http_protocol_class is protocols.http.h11_impl.H11Protocol

import h11
import pytest

from tests.response import Response
from uvicorn.config import Config
from uvicorn.main import ServerState
from uvicorn.protocols.http.h11_impl import H11Protocol
from uvicorn.protocols.websockets.wsproto_impl import WSProtocol

try:
    from uvicorn.protocols.http.httptools_impl import HttpToolsProtocol
except ImportError:  # pragma: nocover
    HttpToolsProtocol = None


HTTP_PROTOCOLS = [p for p in [H11Protocol, HttpToolsProtocol] if p is not None]

SIMPLE_GET_REQUEST = b"\r\n".join([b"GET / HTTP/1.1", b"Host: example.org", b"", b""])

SIMPLE_HEAD_REQUEST = b"\r\n".join([b"HEAD / HTTP/1.1", b"Host: example.org", b"", b""])

SIMPLE_POST_REQUEST = b"\r\n".join(
    [
        b"POST / HTTP/1.1",
        b"Host: example.org",
        b"Content-Type: application/json",
        b"Content-Length: 18",
        b"",
        b'{"hello": "world"}',
    ]
)

def protocol_cls(cls):
        from uvicorn.protocols.http.h11_impl import H11Protocol
        return H11Protocol

try:
    import httptools
except ImportError as exc:  # pragma: no cover
    from uvicorn.protocols.http.h11_impl import H11Protocol

    AutoHTTPProtocol = H11Protocol
else:
    from uvicorn.protocols.http.httptools_impl import HttpToolsProtocol

    AutoHTTPProtocol = HttpToolsProtocol