Add fastapi code

venv/lib/python3.11/site-packages/starlette/_utils.py

@@ -0,0 +1,12 @@
+import asyncio
+import functools
+import typing
+
+
+def is_async_callable(obj: typing.Any) -> bool:
+    while isinstance(obj, functools.partial):
+        obj = obj.func
+
+    return asyncio.iscoroutinefunction(obj) or (
+        callable(obj) and asyncio.iscoroutinefunction(obj.__call__)
+    )