--- /dev/null
+from typing import Pattern
+
+from markdown.extensions import Extension
+from markdown.treeprocessors import Treeprocessor
+
+ATTR_RE: Pattern[str]
+
+class LegacyAttrs(Treeprocessor):
+ def handleAttributes(self, el, txt): ...
+
+class LegacyAttrExtension(Extension): ...
+
+def makeExtension(**kwargs): ...