Recently, a BlockState interface was added for a Comparator. It's looking kind of dry though! Might I suggest a #setMode() method to switch between the two different toggleable states of comparators, Compare and Subtract mode? Evidently, a getter would also be in order to retrieve the current state, so #getMode() as well? Something perhaps like this

public interface Comparator extends BlockState {
    
    public void setMode(ComparatorMode mode);

    public ComparatorMode getMode();

    public enum ComparatorMode {
        COMPARE("Compare"),
        SUBTRACT("Subtract");

        private ComparatorMode(String s) {
        }
    }
}

I've never understood .patch files, so I have the slightest of clue how to implement this myself, so I thought I'd post a JIRA ticket instead. Perhaps someone else would like to take on this task