--- ../contextlib.pyi	2021-06-26 21:36:16.491964153 +1000
+++ contextlib2/__init__.pyi	2021-06-26 21:41:08.109598690 +1000
@@ -1,3 +1,6 @@
+# Type hints copied from the typeshed project under the Apache License 2.0
+# https://github.com/python/typeshed/blob/64c85cdd449ccaff90b546676220c9ecfa6e697f/LICENSE
+
 import sys
 from types import TracebackType
 from typing import (
@@ -16,8 +19,11 @@
 )
 from typing_extensions import ParamSpec, Protocol
 
+# Note: the various 'if True:' guards replace sys.version checks in the
+# original typeshed file that don't apply to the contextlib2 backport API
+
 AbstractContextManager = ContextManager
-if sys.version_info >= (3, 7):
+if True:
     AbstractAsyncContextManager = AsyncContextManager
 
 _T = TypeVar("_T")
@@ -35,7 +41,7 @@
 # type ignore to deal with incomplete ParamSpec support in mypy
 def contextmanager(func: Callable[_P, Iterator[_T]]) -> Callable[_P, _GeneratorContextManager[_T]]: ...  # type: ignore
 
-if sys.version_info >= (3, 7):
+if True:
     def asynccontextmanager(func: Callable[_P, AsyncIterator[_T]]) -> Callable[_P, AsyncContextManager[_T]]: ...  # type: ignore
 
 class _SupportsClose(Protocol):
@@ -46,7 +52,7 @@
 class closing(ContextManager[_SupportsCloseT]):
     def __init__(self, thing: _SupportsCloseT) -> None: ...
 
-if sys.version_info >= (3, 10):
+if True:
     class _SupportsAclose(Protocol):
         async def aclose(self) -> object: ...
     _SupportsAcloseT = TypeVar("_SupportsAcloseT", bound=_SupportsAclose)
@@ -88,7 +94,7 @@
         __traceback: Optional[TracebackType],
     ) -> bool: ...
 
-if sys.version_info >= (3, 7):
+if True:
     _S = TypeVar("_S", bound=AsyncExitStack)
 
     _ExitCoroFunc = Callable[[Optional[Type[BaseException]], Optional[BaseException], Optional[TracebackType]], Awaitable[bool]]
@@ -112,7 +118,7 @@
             __traceback: Optional[TracebackType],
         ) -> Awaitable[bool]: ...
 
-if sys.version_info >= (3, 7):
+if True:
     @overload
     def nullcontext(enter_result: _T) -> ContextManager[_T]: ...
     @overload