This is part of #8362 - I'm hoping to break down that PR into easier-to-review chunks.

1. Uses monkeypatch for
   

   Pillow/Tests/test_image_thumbnail.py

   Lines 112 to 120 in f9767fb

   	def im_draft(
   	mode: str, size: tuple[int, int]
   	) -> tuple[str, tuple[int, int, float, float]] | None:
   	result = draft(mode, size)
   	assert result is not None
   	return result
   	im.draft = im_draft

2. Updates the type arguments in the mock method to match
   

   Pillow/src/PIL/Image.py

   Lines 1326 to 1327 in f9767fb

   	def draft(
   	self, mode: str | None, size: tuple[int, int] | None