static L _registerWeakCollection_preList;

static <A> A _registerWeakCollection(A cl) {
  if (javax() == null) {
    // We're in class init
    if (_registerWeakCollection_preList == null) _registerWeakCollection_preList = synchroList();
    _registerWeakCollection_preList.add(cl);
    ret cl;
  }
  
  try {
    call(javax(), '_registerWeakCollection, cl);
  } catch e {
    printException(e);
    print("Upgrade JavaX!!");
  }
  ret cl;
}

static void _onLoad_registerWeakCollection() {
  assertNotNull(javax());
  if (_registerWeakCollection_preList == null) ret;
  for (O o : _registerWeakCollection_preList)
    _registerWeakCollection(o);
  _registerWeakCollection_preList = null;
}

Began life as a copy of #1010619