@Deprecated
  @Contract(pure = true)
  public static @NotNull <K, V> ConcurrentMap<@NotNull K, @NotNull V> newConcurrentMap() {
    return new ConcurrentHashMap<>();
  }
@Deprecated
  @Contract(pure = true)
  public static @NotNull <K, V> ConcurrentMap<@NotNull K, @NotNull V> newConcurrentMap()