@Contract(value = " -> new", pure = true)
  public static @NotNull <K, V> ConcurrentMap<@NotNull K, @NotNull V> createConcurrentSoftValueMap() {
    return new ConcurrentSoftValueHashMap<>(null);
  }
@Contract(value = " -> new", pure = true)
  public static @NotNull <K, V> ConcurrentMap<@NotNull K, @NotNull V> createConcurrentSoftValueMap()