Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/AbstractContainerMenu_stackableSBoxesMixin.java

@@ -0,0 +1,33 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.helpers.InventoryHelper;
+import net.minecraft.world.inventory.AbstractContainerMenu;
+import net.minecraft.world.inventory.Slot;
+import net.minecraft.world.item.BlockItem;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.level.block.ShulkerBoxBlock;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(AbstractContainerMenu.class)
+public class AbstractContainerMenu_stackableSBoxesMixin
+{
+    @Redirect(method = "doClick", at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/world/inventory/Slot;getMaxStackSize(Lnet/minecraft/world/item/ItemStack;)I"
+    ))
+    private int getMaxCountForSboxesInScreenHander(Slot slot, ItemStack stack)
+    {
+        if (CarpetSettings.shulkerBoxStackSize > 1 &&
+                stack.getItem() instanceof BlockItem &&
+                ((BlockItem)stack.getItem()).getBlock() instanceof ShulkerBoxBlock &&
+                !InventoryHelper.shulkerBoxHasItems(stack)
+        )
+        {
+            return CarpetSettings.shulkerBoxStackSize;
+        }
+        return slot.getMaxStackSize(stack);
+    }
+}