IPsec Anti-Replay

from the 12.2 release notes I see:

You can now use the CLI to globally enable or disable the anti-replay window size. [FBX-9887]

https://www.watchguard.com/support/release-notes/fireware/12/en-us/en_releasenotes_fireware_12_2/fireware_release-notes_v12_2.pdf

What is not clear is whether this completely disables anti-replay or just enables or disables the ability to adjust the window size