+ # This special case is needed to return the correct value from a
+ # "freeze project" API, during which writable status changes
+ # from true to false.
+ #
+ # current_user.can?(write: self) returns true (which is correct
+ # in the context of permission-checking hooks) but the can_write
+ # value we're returning to the caller here represents the state
+ # _after_ the update, i.e., false.