static <A, B> Map<A, B> dangerousWeakMap() {
  ret newDangerousWeakHashMap();
}



// initFunction: voidfunc(Map) - is called initially, and after clearing the map
static <A, B> Map<A, B> dangerousWeakMap(O initFunction) {
  ret newDangerousWeakHashMap(initFunction);
}