static <A, B> B mapGetOrCreate(Map<A, B> map, A key, Class<? extends B> c) {
  ret getOrCreate(map, key, c);
}



// f : func -> B
static <A, B> B mapGetOrCreate(Map<A, B> map, A key, O f) {
  ret getOrCreate(map, key, f);
}

static <A, B> B mapGetOrCreate(Map<A, B> map, A key, IF0<B> f) {
  ret getOrCreate(map, key, (O) f);
}

static <A, B> B nuLike mapGetOrCreate(Class<? extends B> c, Map<A, B> map, A key) {
  ret getOrCreate(c, map, key);
}