Seal/abstract/virtual everything (#6739)

Content.Server/Lock/LockComponent.cs

@@ -9,7 +9,7 @@ namespace Content.Server.Storage.Components
     /// Allows locking/unlocking, with access determined by AccessReader
     /// </summary>
     [RegisterComponent]
-    public class LockComponent : Component
+    public sealed class LockComponent : Component
     {
         [ViewVariables(VVAccess.ReadWrite)] [DataField("locked")] public bool Locked { get; set; } = true;
         [ViewVariables(VVAccess.ReadWrite)] [DataField("lockOnClick")] public bool LockOnClick { get; set; } = false;

Content.Server/Lock/LockSystem.cs

@@ -21,7 +21,7 @@ namespace Content.Server.Lock
     /// Handles (un)locking and examining of Lock components
     /// </summary>
     [UsedImplicitly]
-    public class LockSystem : EntitySystem
+    public sealed class LockSystem : EntitySystem
     {
         [Dependency] private readonly AccessReaderSystem _accessReader = default!;
 

Content.Server/Lock/LockToggledEvent.cs

@@ -2,7 +2,7 @@ using Robust.Shared.GameObjects;
 
 namespace Content.Server.Lock
 {
-    public class LockToggledEvent : EntityEventArgs
+    public sealed class LockToggledEvent : EntityEventArgs
     {
         public readonly bool Locked;