}

  static <K extends @Nullable Object, V extends @Nullable Object> BiMap<K, V> biMap(
      BiMap<K, V> bimap, @CheckForNull Object mutex) {
    if (bimap instanceof SynchronizedBiMap || bimap instanceof ImmutableBiMap) {
      return bimap;
    }
    return new SynchronizedBiMap<>(bimap, mutex, null);
  }

  }

  static <K extends @Nullable Object, V extends @Nullable Object> BiMap<K, V> biMap(
      BiMap<K, V> bimap, @CheckForNull Object mutex) {
    if (bimap instanceof SynchronizedBiMap || bimap instanceof ImmutableBiMap) {
      return bimap;
    }
    return new SynchronizedBiMap<>(bimap, mutex, null);
  }

	sys.rolesMap = make(map[arn.ARN]string)

	// From OpenID
	if riMap := sys.OpenIDConfig.GetRoleInfo(); riMap != nil {
		sys.validateAndAddRolePolicyMappings(ctx, riMap)
	}

	// From AuthN plugin if enabled.
	if authn := newGlobalAuthNPluginFn(); authn != nil {
		riMap := authn.GetRoleInfo()
		sys.validateAndAddRolePolicyMappings(ctx, riMap)
	}

	// Load IAM data from storage.
	for {

				"image/x-freehand",
				"image/x-jp2-codestream",
				"image/x-jp2-container",
				"image/x-niff",
				"image/x-pcx",
				"image/x-pict",
				"image/x-portable-anymap",
				"image/x-portable-bitmap",
				"image/x-portable-graymap",
				"image/x-portable-pixmap",
				"image/x-raw-adobe",
				"image/x-raw-hasselblad",
				"image/x-raw-fuji",
				"image/x-raw-canon",
				"image/x-raw-kodak",