Seal/abstract/virtual everything (#6739)

Content.Server/Maps/Conditions/HolidayMapCondition.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototy
 
 namespace Content.Server.Maps.Conditions;
 
-public class HolidayMapCondition : GameMapCondition
+public sealed class HolidayMapCondition : GameMapCondition
 {
     [DataField("holidays")]
     public string[] Holidays { get; } = default!;

Content.Server/Maps/GameMapManager.cs

@@ -14,7 +14,7 @@ using Robust.Shared.Random;
 
 namespace Content.Server.Maps;
 
-public class GameMapManager : IGameMapManager
+public sealed class GameMapManager : IGameMapManager
 {
     [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
     [Dependency] private readonly IConfigurationManager _configurationManager = default!;

Content.Server/Maps/GameMapPrototype.cs

@@ -13,7 +13,7 @@ namespace Content.Server.Maps;
 /// Prototype data for a game map.
 /// </summary>
 [Prototype("gameMap")]
-public class GameMapPrototype : IPrototype
+public sealed class GameMapPrototype : IPrototype
 {
     /// <inheritdoc/>
     [DataField("id", required: true)]

Content.Server/Maps/NameGenerators/NanotrasenNameGenerator.cs

@@ -6,7 +6,7 @@ using Robust.Shared.Serialization.Manager.Attributes;
 namespace Content.Server.Maps.NameGenerators;
 
 [UsedImplicitly]
-public class NanotrasenNameGenerator : GameMapNameGenerator
+public sealed class NanotrasenNameGenerator : GameMapNameGenerator
 {
     /// <summary>
     ///     Where the map comes from. Should be a two or three letter code, for example "VG" for Packedstation.