Tokens reworked:

- removed outdated code;
 - updated logic to choose a set code for a tokens in different use cases (related to #10150);
 - added many tests for client and server token's data (related to #10139);
 - prepare for tokens database (related #6955);

Mage/src/main/java/mage/game/command/Commander.java

@@ -282,6 +282,16 @@ public class Commander implements CommandObject {
         return sourceObject.getImageName();
     }
 
+    @Override
+    public String getExpansionSetCodeForImage() {
+        return sourceObject.getExpansionSetCode();
+    }
+
+    @Override
+    public void setExpansionSetCodeForImage(String expansionSetCodeForImage) {
+        throw new IllegalStateException("Can't change a set code of the commander, source card already has it");
+    }
+
     @Override
     public int getZoneChangeCounter(Game game) {
         return sourceObject.getZoneChangeCounter(game);