1.19.4 support somewhat..

nms/v1_19_R3/src/main/java/de/epiceric/shopchest/nms/v1_19_R3/FakeItemImpl.java

@@ -0,0 +1,60 @@
+package de.epiceric.shopchest.nms.v1_19_R3;
+
+import de.epiceric.shopchest.nms.FakeItem;
+import net.minecraft.network.protocol.game.ClientboundSetEntityMotionPacket;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.entity.item.ItemEntity;
+import net.minecraft.world.phys.Vec3;
+import org.bukkit.craftbukkit.v1_19_R3.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+
+import java.lang.reflect.Field;
+import java.util.List;
+
+public class FakeItemImpl extends FakeEntityImpl<ItemStack> implements FakeItem {
+
+    private final static EntityDataAccessor<net.minecraft.world.item.ItemStack> DATA_ITEM;
+
+    static {
+        try {
+            final Field dataItemField = ItemEntity.class.getDeclaredField("c"); // DATA_ITEM
+            dataItemField.setAccessible(true);
+            DATA_ITEM = forceCast(dataItemField.get(null));
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public FakeItemImpl() {
+        super();
+    }
+
+    @Override
+    public void sendData(ItemStack item, Iterable<Player> receivers) {
+        sendData(receivers, item);
+    }
+
+    @Override
+    public void resetVelocity(Iterable<Player> receivers) {
+        final ClientboundSetEntityMotionPacket velocityPacket = new ClientboundSetEntityMotionPacket(entityId, Vec3.ZERO);
+        sendPacket(velocityPacket, receivers);
+    }
+
+    @Override
+    protected EntityType<?> getEntityType() {
+        return EntityType.ITEM;
+    }
+
+    @Override
+    protected int getDataItemCount() {
+        return 1;
+    }
+
+    @Override
+    protected void addSpecificData(List<SynchedEntityData.DataValue<?>> packedItems, ItemStack data) {
+        packedItems.add(SynchedEntityData.DataValue.create(DATA_ITEM, CraftItemStack.asNMSCopy(data)));
+    }
+}

nms/v1_19_R3/src/main/java/de/epiceric/shopchest/nms/v1_19_R3/PlatformImpl.java

@@ -0,0 +1,25 @@
+package de.epiceric.shopchest.nms.v1_19_R3;
+
+import de.epiceric.shopchest.nms.FakeArmorStand;
+import de.epiceric.shopchest.nms.FakeItem;
+import de.epiceric.shopchest.nms.Platform;
+import de.epiceric.shopchest.nms.TextComponentHelper;
+
+public class PlatformImpl implements Platform {
+
+    @Override
+    public FakeArmorStand createFakeArmorStand() {
+        return new FakeArmorStandImpl();
+    }
+
+    @Override
+    public FakeItem createFakeItem() {
+        return new FakeItemImpl();
+    }
+
+    @Override
+    public TextComponentHelper getTextComponentHelper() {
+        return new TextComponentHelperImpl();
+    }
+
+}

nms/v1_19_R3/src/main/java/de/epiceric/shopchest/nms/v1_19_R3/TextComponentHelperImpl.java

@@ -0,0 +1,15 @@
+package de.epiceric.shopchest.nms.v1_19_R3;
+
+import de.epiceric.shopchest.nms.TextComponentHelper;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.Tag;
+import org.bukkit.craftbukkit.v1_19_R3.inventory.CraftItemStack;
+import org.bukkit.inventory.ItemStack;
+
+public class TextComponentHelperImpl implements TextComponentHelper {
+    @Override
+    public String getNbt(ItemStack itemStack) {
+        final Tag tag = CraftItemStack.asNMSCopy(itemStack).save(new CompoundTag()).get("tag");
+        return tag == null ? null : tag.getAsString();
+    }
+}