Avoid ty error on method name

Author: adamtheturtle

src/mock_vws/_requests_mock_server/mock_web_query_api.py

@@ -7,6 +7,7 @@
 import email.utils
 from collections.abc import Callable, Iterable, Mapping
 from http import HTTPMethod, HTTPStatus
+from types import MethodType
 
 from beartype import beartype
 from requests.models import PreparedRequest
@@ -52,8 +53,9 @@ def decorator(
             The given `method` with multiple changes, including added
             validators.
         """
+        route_name = method.__name__ if isinstance(method, MethodType) else ""
         new_route = Route(
-            route_name=method.__name__,
+            route_name=route_name,
             path_pattern=path_pattern,
             http_methods=frozenset(http_methods),
         )