Paper/nms-patches/TileEntityDispenser.patch

--- a/net/minecraft/server/TileEntityDispenser.java
+++ b/net/minecraft/server/TileEntityDispenser.java
@@ -1,12 +1,48 @@
 package net.minecraft.server;
 
 import java.util.Random;
+// CraftBukkit start
+import java.util.List;
+
+import org.bukkit.craftbukkit.entity.CraftHumanEntity;
+import org.bukkit.entity.HumanEntity;
+// CraftBukkit end
 
 public class TileEntityDispenser extends TileEntityLootable {
 
     private static final Random a = new Random();
     private NonNullList<ItemStack> items;
 
+    // CraftBukkit start - add fields and methods
+    public List<HumanEntity> transaction = new java.util.ArrayList<HumanEntity>();
+    private int maxStack = MAX_STACK;
+
+    public List<ItemStack> getContents() {
+        return this.items;
+    }
+
+    public void onOpen(CraftHumanEntity who) {
+        transaction.add(who);
+    }
+
+    public void onClose(CraftHumanEntity who) {
+        transaction.remove(who);
+    }
+
+    public List<HumanEntity> getViewers() {
+        return transaction;
+    }
+
+    @Override
+    public int getMaxStackSize() {
+        return maxStack;
+    }
+
+    public void setMaxStackSize(int size) {
+        maxStack = size;
+    }
+    // CraftBukkit end
+
     protected TileEntityDispenser(TileEntityTypes<?> tileentitytypes) {
         super(tileentitytypes);
         this.items = NonNullList.a(9, ItemStack.a);