···11/*
22- A sink has the signature: `signalT('a) => unit`
33- A source thus has the signature: `sink => unit`, or `(signalT('a) => unit) => unit`
44- */
55-22+ A sink has the signature: `signalT('a) => unit`
33+ A source thus has the signature: `sink => unit`, or `(signalT('a) => unit) => unit`
44+ */
65type talkbackT =
76 | Pull
87 | End;