It's mentioned in the README, and I see it [in the PureScript](https://pursuit.purescript.org/packages/purescript-concur-core/0.4.1/docs/Concur.Core.Types#v:andd) documentation, but I don't see one in `concur-core`. Would this be a good thing to add?
It's mentioned in the README, and I see it in the PureScript documentation, but I don't see one in
concur-core. Would this be a good thing to add?