in miredot/lib/lunr/js/lunr.js [110:121]
lunr.FieldRef.fromString = function (s) {
var n = s.indexOf(lunr.FieldRef.joiner)
if (n === -1) {
throw "malformed field ref string"
}
var fieldRef = s.slice(0, n),
docRef = s.slice(n + 1)
return new lunr.FieldRef (docRef, fieldRef, s)
}