module ActiveSupport::DescendantsTracker

def direct_descendants(klass)
  ActiveSupport::Deprecation.warn(<<~MSG)
    ActiveSupport::DescendantsTracker.direct_descendants is deprecated and will be removed in Rails 7.1.
    Use ActiveSupport::DescendantsTracker.subclasses instead.
  MSG
  subclasses(klass)
end