Change record status: 
Project: 
Introduced in branch: 
11.4.x
Introduced in version: 
11.4.0
Description: 

Constants for anonymous contact settings are deprecated. Use \Drupal\comment\AnonymousContact enum instead.

Before:
CommentItemInterface::ANONYMOUS_MAYNOT_CONTACT
CommentItemInterface::ANONYMOUS_MAY_CONTACT
CommentItemInterface::ANONYMOUS_MUST_CONTACT

After:
\Drupal\comment\AnonymousContact::Forbidden
\Drupal\comment\AnonymousContact::Allowed
\Drupal\comment\AnonymousContact::Required

Impacts: 
Module developers