Issue #14605: Expose importlib.abc.FileLoader and
importlib.machinery.(FileFinder, SourceFileLoader,
_SourcelessFileLoader, ExtensionFileLoader).
This exposes all of importlib's mechanisms that will become public on
the sys module.
diff --git a/Lib/importlib/machinery.py b/Lib/importlib/machinery.py
index 5197744..c9906c7 100644
--- a/Lib/importlib/machinery.py
+++ b/Lib/importlib/machinery.py
@@ -3,3 +3,7 @@
from ._bootstrap import BuiltinImporter
from ._bootstrap import FrozenImporter
from ._bootstrap import PathFinder
+from ._bootstrap import FileFinder
+from ._bootstrap import SourceFileLoader
+from ._bootstrap import _SourcelessFileLoader
+from ._bootstrap import ExtensionFileLoader