Implement getNMSWorld on EntityMinecartContainer

Was missed because the class is abstract and nothing implementing the class was imported in Paper

Spigot-Server-Patches/0153-LootTable-API-Replenishable-Lootables-Feature.patch

@@ -1,4 +1,4 @@
-From 82ffa4af43c27227820035be39705b4a233087c2 Mon Sep 17 00:00:00 2001
+From a19f9f1576418e180545e27121f2667b0d74fbc5 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sun, 1 May 2016 21:19:14 -0400
 Subject: [PATCH] LootTable API & Replenishable Lootables Feature
@@ -404,7 +404,7 @@ index 0000000..4b2c3fd
 +    }
 +}
 diff --git a/src/main/java/net/minecraft/server/EntityMinecartContainer.java b/src/main/java/net/minecraft/server/EntityMinecartContainer.java
-index 56e7de8..51b29c8 100644
+index 56e7de8..4b3cf93 100644
 --- a/src/main/java/net/minecraft/server/EntityMinecartContainer.java
 +++ b/src/main/java/net/minecraft/server/EntityMinecartContainer.java
 @@ -3,17 +3,20 @@ package net.minecraft.server;
@@ -459,7 +459,7 @@ index 56e7de8..51b29c8 100644
              Random random;
  
              if (this.d == 0L) {
-@@ -249,12 +254,42 @@ public abstract class EntityMinecartContainer extends EntityMinecartAbstract imp
+@@ -249,12 +254,47 @@ public abstract class EntityMinecartContainer extends EntityMinecartAbstract imp
  
      }
  
@@ -483,6 +483,11 @@ index 56e7de8..51b29c8 100644
 +        return lootableData;
 +    }
 +
++    @Override
++    public World getNMSWorld() {
++        return this.world;
++    }
++
 +    public String getLootTableName() {
 +        final MinecraftKey key = getLootTableKey();
 +        return key != null ? key.toString() : null;