They are different for `saveImpression` and `measureConversion`, as the latter can expect either an error or a value. _Originally posted by @apasel422 in https://github.com/w3c/attribution/pull/420#discussion_r3397288594_
They are different for
saveImpressionandmeasureConversion, as the latter can expect either an error or a value.Originally posted by @apasel422 in w3c/attribution#420 (comment)