From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cryptite <cryptite@gmail.com>
Date: Mon, 10 Apr 2023 07:37:05 -0500
Subject: [PATCH] Add 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 18aac3da3c88f33b1a71a5920a8daa27e9723913..af0720fb8bd334aac5493121c6373d87421204b4 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -222,6 +222,7 @@ 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
     private final alternate.current.wire.WireHandler wireHandler = new alternate.current.wire.WireHandler(this); // Paper - optimize redstone (Alternate Current)
     public static Throwable getAddToWorldStackTrace(Entity entity) {
         final Throwable thr = 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 1a481fb4f4228f0fea8a7dc6132248c98b727c90..836bdbf4a4742f0cce0f9612d694db03305c7a00 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1268,6 +1268,18 @@ 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().getServer().setDifficulty(this.getHandle(), net.minecraft.world.Difficulty.byId(difficulty.getValue()), true); // Paper - don't skip other difficulty-changing logic