From d13a85390967bd9be02d82ecf4769e31186e4ba4 Mon Sep 17 00:00:00 2001
From: Rutger Kok <rutger.kok@live.com>
Date: Sun, 19 Aug 2018 11:03:54 +0200
Subject: [PATCH] Remove error for duplicate world creation. Fixes #1

If a world is created using the Bukkit.createWorld API, Bukkit asks plugins multiple times to provide a world generator for the same world. So the error needs to be removed.
---
 .../worldgeneratorapi/internal/WorldGeneratorApiImpl.java   | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/WorldGeneratorApiImpl.java b/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/WorldGeneratorApiImpl.java
index 38c7df8..0ccee76 100644
--- a/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/WorldGeneratorApiImpl.java
+++ b/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/WorldGeneratorApiImpl.java
@@ -28,11 +28,7 @@ public class WorldGeneratorApiImpl extends JavaPlugin implements WorldGeneratorA
 
     @Override
     public ChunkGenerator createCustomGenerator(WorldRef world, Consumer<WorldGenerator> consumer) {
-        Consumer<WorldGenerator> previous = this.worldGeneratorModifiers.putIfAbsent(world, consumer);
-        if (previous != null) {
-            throw new IllegalArgumentException(
-                    "World " + world.getName() + " was already assigned to a world generator, namely " + previous);
-        }
+        this.worldGeneratorModifiers.putIfAbsent(world, consumer);
         return new DummyBukkitChunkGenerator(this);
     }