static <A> void addToListWithMaxSize(L<A> l, A a, int maxSize) {
  if (l == null || maxSize <= 0) ret;
  synchronized(collectionMutex(l)) {
    int n;
    while ((n = l.size()) >= maxSize) {
      l.remove(0);
      if (l.size() != n-1)
        fail("List remove failed!? " + l.size() + " / " + n + " / " + objectToStringWithClassName(l));
    }
    l.add(a);
  }
}