More moves and compilation fixes

src/main/java/appeng/items/parts/FacadeItem.java

@@ -30,7 +30,7 @@ import net.minecraft.tag.BlockTags;
 import net.minecraft.tag.Tag;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Identifier;
-import net.minecraft.util.NonNullList;
+import net.minecraft.util.collection.DefaultedList;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.registry.Registry;
 import net.minecraft.text.Text;
@@ -82,7 +82,7 @@ public class FacadeItem extends AEBaseItem implements IFacadeItem, IAlphaPassIte
     }
 
     @Override
-    public void fillItemGroup(ItemGroup group, NonNullList<ItemStack> items) {
+    public void appendStacks(ItemGroup group, DefaultedList<ItemStack> items) {
     }
 
     public ItemStack createFacadeForItem(final ItemStack itemStack, final boolean returnItem) {