add annotation

src/main/java/pers/xanadu/enderdragon/nms/NMSItem/I_NMSItemManager.java

@@ -1,11 +1,15 @@
 package pers.xanadu.enderdragon.nms.NMSItem;
 
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.TestOnly;
 
 public interface I_NMSItemManager {
     ItemStack readAsItem(String nbt);
     ItemStack cpdToItem(Object cpd);
+    @TestOnly
     Object parseNBT(Object nbt_base);
+    @TestOnly
     Object readAsNBTBase(String raw);
+    @TestOnly
     Object getNBTBase(Object obj);
 }

src/main/java/pers/xanadu/enderdragon/nms/NMSItem/v1_13_R2_above/NMSItemManager.java

@@ -2,6 +2,7 @@ package pers.xanadu.enderdragon.nms.NMSItem.v1_13_R2_above;
 
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.TestOnly;
 import pers.xanadu.enderdragon.EnderDragon;
 import pers.xanadu.enderdragon.config.Lang;
 import pers.xanadu.enderdragon.nms.NMSItem.I_NMSItemManager;