gh-149119: docs: mention that sentinel does not support subclassing (#149120)
Add note about sentinel objects not supporting subclassing Clarify that sentinel objects do not support subclassing.
S
Stelar committed
2674c322c6cc5a81ce54d807c64cb0e221521786
Parent: 40dc61a
Committed by GitHub <noreply@github.com>
on 4/28/2026, 11:50:53 PM