mypy

319980b2 - [1.0 backport] Fix crash on prefixed paramspec with deferral (#14569) (#14586)

[1.0 backport] Fix crash on prefixed paramspec with deferral (#14569) (#14586) Fixes #14565 The fix looks simple, looks like an obvious omission. Co-authored-by: Ivan Levkivskyi <levkivskyi@gmail.com>