1 files changed, 28 insertions, 0 deletions
diff --git a/src/main/java/me/shedaniel/rei/api/ItemRegistry.java b/src/main/java/me/shedaniel/rei/api/ItemRegistry.java
index 1b3b0218b..8751da416 100644
--- a/src/main/java/me/shedaniel/rei/api/ItemRegistry.java
+++ b/src/main/java/me/shedaniel/rei/api/ItemRegistry.java
@@ -1,3 +1,8 @@
+/*
+ * Roughly Enough Items by Danielshe.
+ * Licensed under the MIT License.
+ */
+
 package me.shedaniel.rei.api;
 
 import net.minecraft.item.Item;
@@ -7,12 +12,29 @@ import java.util.List;
 
 public interface ItemRegistry {
     
+    /**
+     * Gets the current unmodifiable item list
+     *
+     * @return an unmodifiable item list
+     */
     List<ItemStack> getItemList();
     
+    /**
+     * Gets the current modifiable item list
+     *
+     * @return an modifiable item list
+     */
+    @Deprecated
     List<ItemStack> getModifiableItemList();
     
     ItemStack[] getAllStacksFromItem(Item item);
     
+    /**
+     * Registers an new stack to the item list
+     *
+     * @param afterItem
+     * @param stack     the stack to register
+     */
     void registerItemStack(Item afterItem, ItemStack stack);
     
     default void registerItemStack(Item afterItem, ItemStack... stacks) {
@@ -27,6 +49,12 @@ public interface ItemRegistry {
                 registerItemStack(null, stack);
     }
     
+    /**
+     * Checks if a stack is already registered
+     *
+     * @param stack the stack to check
+     * @return whether the stack has been registered
+     */
     default boolean alreadyContain(ItemStack stack) {
         return getItemList().stream().anyMatch(stack1 -> ItemStack.areEqual(stack, stack1));
     }