diff --git a/Content.Shared/Storage/EntitySystems/SharedItemMapperSystem.cs b/Content.Shared/Storage/EntitySystems/SharedItemMapperSystem.cs
index eb20c65a11..7ae821d8d9 100644
--- a/Content.Shared/Storage/EntitySystems/SharedItemMapperSystem.cs
+++ b/Content.Shared/Storage/EntitySystems/SharedItemMapperSystem.cs
@@ -4,107 +4,109 @@ using Content.Shared.Whitelist;
 using JetBrains.Annotations;
 using Robust.Shared.Containers;
 
-namespace Content.Shared.Storage.EntitySystems
+namespace Content.Shared.Storage.EntitySystems;
+
+/// <summary>
+/// <c>ItemMapperSystem</c> is a system that on each initialization, insertion, removal of an entity from
+/// given <see cref="ItemMapperComponent"/> (with appropriate storage attached) will check each stored item to see
+/// if its tags/component, and overall quantity match <see cref="ItemMapperComponent.MapLayers"/>.
+/// </summary>
+[UsedImplicitly]
+public abstract class SharedItemMapperSystem : EntitySystem
 {
-    /// <summary>
-    /// <c>ItemMapperSystem</c> is a system that on each initialization, insertion, removal of an entity from
-    /// given <see cref="ItemMapperComponent"/> (with appropriate storage attached) will check each stored item to see
-    /// if its tags/component, and overall quantity match <see cref="ItemMapperComponent.MapLayers"/>.
-    /// </summary>
-    [UsedImplicitly]
-    public abstract class SharedItemMapperSystem : EntitySystem
+    [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
+    [Dependency] private readonly SharedContainerSystem _container = default!;
+    [Dependency] private readonly EntityWhitelistSystem _whitelistSystem = default!;
+
+    /// <inheritdoc />
+    public override void Initialize()
     {
-        [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
-        [Dependency] private readonly SharedContainerSystem _container = default!;
-        [Dependency] private readonly EntityWhitelistSystem _whitelistSystem = default!;
+        base.Initialize();
+        SubscribeLocalEvent<ItemMapperComponent, ComponentInit>(InitLayers);
+        SubscribeLocalEvent<ItemMapperComponent, EntInsertedIntoContainerMessage>(MapperEntityInserted);
+        SubscribeLocalEvent<ItemMapperComponent, EntRemovedFromContainerMessage>(MapperEntityRemoved);
+    }
 
-        /// <inheritdoc />
-        public override void Initialize()
+    private void InitLayers(EntityUid uid, ItemMapperComponent component, ComponentInit args)
+    {
+        foreach (var (layerName, val) in component.MapLayers)
         {
-            base.Initialize();
-            SubscribeLocalEvent<ItemMapperComponent, ComponentInit>(InitLayers);
-            SubscribeLocalEvent<ItemMapperComponent, EntInsertedIntoContainerMessage>(MapperEntityInserted);
-            SubscribeLocalEvent<ItemMapperComponent, EntRemovedFromContainerMessage>(MapperEntityRemoved);
+            val.Layer = layerName;
         }
 
-        private void InitLayers(EntityUid uid, ItemMapperComponent component, ComponentInit args)
+        if (EntityManager.TryGetComponent(uid, out AppearanceComponent? appearanceComponent))
         {
-            foreach (var (layerName, val) in component.MapLayers)
-            {
-                val.Layer = layerName;
-            }
-
-            if (EntityManager.TryGetComponent(uid, out AppearanceComponent? appearanceComponent))
-            {
-                var list = new List<string>(component.MapLayers.Keys);
-                _appearance.SetData(uid, StorageMapVisuals.InitLayers, new ShowLayerData(list), appearanceComponent);
-            }
-
-            // Ensure appearance is correct with current contained entities.
-            UpdateAppearance(uid, component);
+            var list = new List<string>(component.MapLayers.Keys);
+            _appearance.SetData(uid, StorageMapVisuals.InitLayers, new ShowLayerData(list), appearanceComponent);
         }
 
-        private void MapperEntityRemoved(EntityUid uid, ItemMapperComponent itemMapper,
-            EntRemovedFromContainerMessage args)
+        // Ensure appearance is correct with current contained entities.
+        UpdateAppearance(uid, component);
+    }
+
+    private void MapperEntityRemoved(EntityUid uid, ItemMapperComponent itemMapper, EntRemovedFromContainerMessage args)
+    {
+        if (itemMapper.ContainerWhitelist != null && !itemMapper.ContainerWhitelist.Contains(args.Container.ID))
+            return;
+
+        UpdateAppearance(uid, itemMapper);
+    }
+
+    private void MapperEntityInserted(EntityUid uid,
+        ItemMapperComponent itemMapper,
+        EntInsertedIntoContainerMessage args)
+    {
+        if (itemMapper.ContainerWhitelist != null && !itemMapper.ContainerWhitelist.Contains(args.Container.ID))
+            return;
+
+        UpdateAppearance(uid, itemMapper);
+    }
+
+    private void UpdateAppearance(EntityUid uid, ItemMapperComponent? itemMapper = null)
+    {
+        if (!Resolve(uid, ref itemMapper))
+            return;
+
+        if (EntityManager.TryGetComponent(uid, out AppearanceComponent? appearanceComponent)
+            && TryGetLayers(uid, itemMapper, out var containedLayers))
         {
-            if (itemMapper.ContainerWhitelist != null && !itemMapper.ContainerWhitelist.Contains(args.Container.ID))
-                return;
-
-            UpdateAppearance(uid, itemMapper);
-        }
-
-        private void MapperEntityInserted(EntityUid uid, ItemMapperComponent itemMapper,
-            EntInsertedIntoContainerMessage args)
-        {
-            if (itemMapper.ContainerWhitelist != null && !itemMapper.ContainerWhitelist.Contains(args.Container.ID))
-                return;
-
-            UpdateAppearance(uid, itemMapper);
-        }
-
-        private void UpdateAppearance(EntityUid uid, ItemMapperComponent? itemMapper = null)
-        {
-            if(!Resolve(uid, ref itemMapper))
-                return;
-
-            if (EntityManager.TryGetComponent(uid, out AppearanceComponent? appearanceComponent)
-                && TryGetLayers(uid, itemMapper, out var containedLayers))
-            {
-                _appearance.SetData(uid, StorageMapVisuals.LayerChanged, new ShowLayerData(containedLayers), appearanceComponent);
-            }
-        }
-
-        /// <summary>
-        /// Method that iterates over storage of the entity in <paramref name="uid"/> and sets <paramref name="containedLayers"/> according to
-        /// <paramref name="itemMapper"/> definition. It will have O(n*m) time behavior (n - number of entities in container, and m - number of
-        /// definitions in <paramref name="containedLayers"/>.
-        /// </summary>
-        /// <param name="uid">EntityUid used to search the storage</param>
-        /// <param name="itemMapper">component that contains definition used to map <see cref="Content.Shared.Whitelist.EntityWhitelist">whitelist</see> in
-        /// <c>mapLayers</c> to string.
-        /// </param>
-        /// <param name="containedLayers">list of <paramref name="itemMapper"/> layers that should be visible</param>
-        /// <returns>false if <c>msg.Container.Owner</c> is not a storage, true otherwise.</returns>
-        private bool TryGetLayers(EntityUid uid,
-            ItemMapperComponent itemMapper,
-            out List<string> showLayers)
-        {
-            var containedLayers = _container.GetAllContainers(uid)
-                .Where(c => itemMapper.ContainerWhitelist?.Contains(c.ID) ?? true).SelectMany(cont => cont.ContainedEntities).ToArray();
-
-            var list = new List<string>();
-            foreach (var mapLayerData in itemMapper.MapLayers.Values)
-            {
-                var count = containedLayers.Count(ent => _whitelistSystem.IsWhitelistPassOrNull(mapLayerData.Whitelist,
-                    ent));
-                if (count >= mapLayerData.MinCount && count <= mapLayerData.MaxCount)
-                {
-                    list.Add(mapLayerData.Layer);
-                }
-            }
-
-            showLayers = list;
-            return true;
+            _appearance.SetData(uid,
+                StorageMapVisuals.LayerChanged,
+                new ShowLayerData(containedLayers),
+                appearanceComponent);
         }
     }
+
+    /// <summary>
+    /// Method that iterates over storage of the entity in <paramref name="uid"/> and sets <paramref name="showLayers"/>
+    /// according to <paramref name="itemMapper"/> definition. It will have O(n*m) time behavior
+    /// (n - number of entities in container, and m - number of definitions in <paramref name="showLayers"/>).
+    /// </summary>
+    /// <param name="uid">EntityUid used to search the storage</param>
+    /// <param name="itemMapper">component that contains definition used to map
+    /// <see cref="EntityWhitelist">Whitelist</see> in <see cref="ItemMapperComponent.MapLayers"/> to string.
+    /// </param>
+    /// <param name="showLayers">list of <paramref name="itemMapper"/> layers that should be visible</param>
+    /// <returns>false if <c>msg.Container.Owner</c> is not a storage, true otherwise.</returns>
+    private bool TryGetLayers(EntityUid uid, ItemMapperComponent itemMapper, out List<string> showLayers)
+    {
+        var containedLayers = _container.GetAllContainers(uid)
+            .Where(c => itemMapper.ContainerWhitelist?.Contains(c.ID) ?? true)
+            .SelectMany(cont => cont.ContainedEntities)
+            .ToArray();
+
+        var list = new List<string>();
+        foreach (var mapLayerData in itemMapper.MapLayers.Values)
+        {
+            var count = containedLayers.Count(ent => _whitelistSystem.IsWhitelistPassOrNull(mapLayerData.Whitelist,
+                ent));
+            if (count >= mapLayerData.MinCount && count <= mapLayerData.MaxCount)
+            {
+                list.Add(mapLayerData.Layer);
+            }
+        }
+
+        showLayers = list;
+        return true;
+    }
 }