Seal/abstract/virtual everything (#6739)

Content.Client/Suspicion/SuspicionGui.xaml.cs

@@ -17,7 +17,7 @@ using static Robust.Client.UserInterface.Controls.BaseButton;
 namespace Content.Client.Suspicion
 {
     [GenerateTypedNameReferences]
-    public partial class SuspicionGui : Control
+    public sealed partial class SuspicionGui : Control
     {
         [Dependency] private readonly IPlayerManager _playerManager = default!;
         [Dependency] private readonly IGameTiming _timing = default!;

Content.Client/Suspicion/SuspicionRoleComponent.cs

@@ -12,7 +12,7 @@ using Robust.Shared.ViewVariables;
 namespace Content.Client.Suspicion
 {
     [RegisterComponent]
-    public class SuspicionRoleComponent : SharedSuspicionRoleComponent
+    public sealed class SuspicionRoleComponent : SharedSuspicionRoleComponent
     {
         [Dependency] private readonly IGameHud _gameHud = default!;
         [Dependency] private readonly IOverlayManager _overlayManager = default!;

Content.Client/Suspicion/SuspicionRoleSystem.cs

@@ -3,7 +3,7 @@ using Robust.Shared.GameObjects;
 
 namespace Content.Client.Suspicion
 {
-    class SuspicionRoleSystem : EntitySystem
+    sealed class SuspicionRoleSystem : EntitySystem
     {
         public override void Initialize()
         {

Content.Client/Suspicion/TraitorOverlay.cs

@@ -12,7 +12,7 @@ using Robust.Shared.Physics;
 
 namespace Content.Client.Suspicion
 {
-    public class TraitorOverlay : Overlay
+    public sealed class TraitorOverlay : Overlay
     {
         private readonly IEntityManager _entityManager;
         private readonly IPlayerManager _playerManager;