@Override public C.Set<T> parallel() { setFeature(C.Feature.PARALLEL); return this; }
@Override public C.Set<T> lazy() { setFeature(C.Feature.LAZY); return this; }
@Override public C.Set<T> lazy() { setFeature(C.Feature.LAZY); return this; }
@Override public C.Set<T> parallel() { setFeature(C.Feature.PARALLEL); return this; }