Make IsGameVersion virtual, specify MP4/TM2020 for ghosts

Src/GBX.NET/Engines/Game/CGameCtnGhost.cs

@@ -206,4 +206,17 @@ public override string ToString()
             return $"{Time.ToTmString()} ({(Speed.HasValue ? $"{Speed}km/h, " : "")}{StuntsScore} pts.)";
         }
     }
+
+    public override bool IsGameVersion(GameVersion version, bool strict = false)
+    {
+        if (!base.IsGameVersion(version, strict))
+        {
+            return false;
+        }
+        if (version == (GameVersion.MP4 | GameVersion.TM2020))
+        {
+            return Chunks.Any(static x => x is Chunk03092029);
+        }
+        return true;
+    }
 }

Src/GBX.NET/Engines/MwFoundations/CMwNod.cs

@@ -670,6 +670,9 @@ protected void DeepCloneChunks(IClass dest)
         }
     }
 
+    /// <summary>
+    /// The version of the game where this node should be accepted without a game crash.
+    /// </summary>
     public GameVersion GameVersion
     {
         get
@@ -685,13 +688,24 @@ public GameVersion GameVersion
         }
     }
 
-    public bool IsGameVersion(GameVersion version, bool strict = false)
+    /// <summary>
+    /// Checks if the node is accepted in the given game version without a game crash.
+    /// </summary>
+    /// <param name="version">Game version flags.</param>
+    /// <param name="strict">If enabled, checks for the exact flag match (if accepted in MP4 and TM2020, only <c>MP4 | TM2020</c> will return true).</param>
+    /// <returns>True if matches, false if not.</returns>
+    public virtual bool IsGameVersion(GameVersion version, bool strict = false)
     {
         return strict
             ? GameVersion == version
             : (GameVersion & version) == version;
     }
 
+    /// <summary>
+    /// Checks if the node could be accepted in the given game version.
+    /// </summary>
+    /// <param name="version">Game version flags.</param>
+    /// <returns>True if matches, false if not.</returns>
     public bool CanBeGameVersion(GameVersion version)
     {
         return (GameVersion & version) != 0;