Inverts an object

invertsObject.js

const invertObject = x => {
  let sol = {}
  R.mapObjIndexed((val, key, obj) => {
    R.map(type => {
      if (type in sol) {
        sol[type].push(key);
      } else {
        sol[type] = [key]
      }  
    })(val)
  }, x)
  return sol
}