mob spawn settings

paper-server/patches/sources/net/minecraft/world/level/biome/MobSpawnSettings.java.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/world/level/biome/MobSpawnSettings.java
 +++ b/net/minecraft/world/level/biome/MobSpawnSettings.java
-@@ -75,8 +75,40 @@
+@@ -75,8 +_,40 @@
      }
  
      public static class Builder {
@@ -36,9 +36,9 @@
 +        }
 +        // use toImmutableEnumMap collector
          private final Map<MobCategory, List<MobSpawnSettings.SpawnerData>> spawners = Stream.of(MobCategory.values())
--            .collect(ImmutableMap.toImmutableMap(mobCategory -> (MobCategory)mobCategory, mobCategory -> Lists.newArrayList()));
+-            .collect(ImmutableMap.toImmutableMap(key -> (MobCategory)key, value -> Lists.newArrayList()));
 +            .collect(Maps.toImmutableEnumMap(mobCategory -> (MobCategory)mobCategory, mobCategory -> new MobList())); // Use MobList instead of ArrayList
-+        // Paper end - Perf: keep track of data in a pair set to give O(1) contains calls
++            // Paper end - Perf: keep track of data in a pair set to give O(1) contains calls
          private final Map<EntityType<?>, MobSpawnSettings.MobSpawnCost> mobSpawnCosts = Maps.newLinkedHashMap();
          private float creatureGenerationProbability = 0.1F;