Which predicate to use to only transform if the key is present? for example (transform [:a ?] inc {:b 2})
must
? https://github.com/redplanetlabs/specter/wiki/List-of-Navigators#must
> (spec/transform [spec/ALL (spec/must :a)] inc [{:b 2}
{:a 2}])
[{:b 2} {:a 3}]
Yup, exactly! Thank you!