code: public static <T> Reducer<PersistentList<T>,T> toPersistentVector() {
          return Reducer.fromMonoid(Monoids.concatPersistentCollection(Vector.empty()), a -> Vector.of(a));
      }
docs: <pre>
  {@code
  PersistentList<Integer> q = Reducers.toPersistentVector()
  .foldMap(Stream.of(1,2,3,4));
  
  }
  </pre>
  @return Reducer for Vector