From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cryptite <cryptite@gmail.com>
Date: Mon, 18 Oct 2021 08:52:40 -0500
Subject: [PATCH] World Instance Flag


diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index a62abcb2e05198001516cf2402dc7ead09761905..3bb1732b9bdb098b6f543c778c299e44e32c5ce2 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -200,6 +200,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
     public final UUID uuid;
     public boolean hasPhysicsEvent = true; // Paper
     public boolean hasEntityMoveEvent = false; // Paper
+    public boolean instance; // Slice
     public static Throwable getAddToWorldStackTrace(Entity entity) {
         return new Throwable(entity + " Added to world at " + new java.util.Date());
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 00d8b61c04ac91770b0ff3b846d3ff70bef2e8e7..d7a755092370b7478fb8aa8b8e211c01f430ff5e 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1196,6 +1196,18 @@ public class CraftWorld extends CraftRegionAccessor implements World {
         world.noSave = !value;
     }
 
+    // Slice start
+    @Override
+    public boolean isInstance() {
+        return world.instance;
+    }
+
+    @Override
+    public void setInstance(boolean value) {
+        world.instance = value;
+    }
+    // Slice end
+
     @Override
     public void setDifficulty(Difficulty difficulty) {
         this.getHandle().serverLevelData.setDifficulty(net.minecraft.world.Difficulty.byId(difficulty.getValue()));