@ReviseWhenPortedToJDK(value = "10", description = "Collectors.toUnmodifiableSet()")
  public static @NotNull Set<PluginId> getRegisteredIds() {
    return Collections.unmodifiableSet(new HashSet<>(registeredIds.values()));
  }
@ReviseWhenPortedToJDK(value = "10", description = "Collectors.toUnmodifiableSet()")
  public static @NotNull Set<PluginId> getRegisteredIds()