static <A> L<A> syncInstancesOf(Iterable i, Class<A> c) {
  if (i == null) ret new L;
  synchronized(i) {
    ret collectInstances(i, c);
  }
}



static <A> L<A> nuLike syncInstancesOf(Class<A> c, Iterable i) {
  ret syncInstancesOf(i, c);
}

Began life as a copy of #1017023