@Contract(value = "-> new", pure = true)
  public static <K, V> @NotNull Map<K, V> createSmallMemoryFootprintLinkedMap() {
    //noinspection SSBasedInspection
    return new Object2ObjectLinkedOpenHashMap<>();
  }
@Contract(value = "-> new", pure = true)
  public static <K, V> @NotNull Map<K, V> createSmallMemoryFootprintLinkedMap()