static O[] toArray(Collection c) {
  ret toObjectArray(c);
}

static <A> A[] nuLike toArray(Class<A> type, Iterable<A> c) {
  ret toArray(c, type);
}

static <A> A[] toArray(Class<A> type, Cl<A> c) {
  ret toArray(c, type);
}

static <A> A[] toArray(Cl<A> c, Class<A> type) {
  A[] a = arrayOfType(l(c), type);
  if (a.length == 0) ret a;
  asList(c).toArray(a);
  ret a;
}

static <A> A[] toArray(Iterable<A> c, Class<A> type) {
  var c2 = asList(c);
  A[] a = arrayOfType(l(c2), type);
  if (a.length == 0) ret a;
  c2.toArray(a);
  ret a;
}

// array must have correct length and will be filled
static <A> A[] toArray(A[] array, Collection c) {
  if (array == null || c == null) null;
  asList(c).toArray(array);
  ret array;
}