RSTile: setDecorativeObject (#2967)

Co-authored-by: ImNo <kylian@iphone.nl>

runescape-api/src/main/java/net/runelite/rs/api/RSTile.java

@@ -24,6 +24,10 @@ public interface RSTile extends Tile
 	@Override
 	DecorativeObject getDecorativeObject();
 
+	@Import("wallDecoration")
+	@Override
+	void setDecorativeObject(DecorativeObject object);
+	
 	@Import("floorDecoration")
 	@Override
 	GroundObject getGroundObject();