Ah. Traced it back to @tstatler https://github.com/asolove/montage/blame/dba437858f627558570d1202f6daf3b4fa0b85fe/ui/composer/composer.js#L14

I think it’s safe to infer that we’re talking about the translate composer. Is it also safe to say that all composers are “event composers”? If so, I think we should void the distinction in the docs. The translate composer is merely an event composer that tracks some deltas from previous events.