import * as has from "ramda/src/has" ; import * as all from "ramda/src/all" ; export default function ( config , reducerName , records ) { var haskey = has ( config . key ) ; var allKeys = all ( haskey , records ) ; if ( ! allKeys ) { throw new Error ( reducerName + ": Expected all records to have a value for the store's key `" + config . key + "`" ) ; } }