make registry return optional for get operations

common/addons/config-biome/src/main/java/com/dfsek/terra/addons/biome/BiomeConfigType.java

@@ -34,10 +34,8 @@ public class BiomeConfigType implements ConfigType<BiomeTemplate, TerraBiome> {
     public Supplier<OpenRegistry<TerraBiome>> registrySupplier(ConfigPack pack) {
         return () -> pack.getRegistryFactory().create(registry -> (TypeLoader<TerraBiome>) (t, c, loader) -> {
             if(c.equals("SELF")) return null;
-            TerraBiome obj = registry.get((String) c);
-            if(obj == null)
-                throw new LoadException("No such " + t.getType().getTypeName() + " matching \"" + c + "\" was found in this registry.");
-            return obj;
+            return registry.get((String) c).orElseThrow(() -> new LoadException(
+                    "No such " + t.getType().getTypeName() + " matching \"" + c + "\" was found in this registry."));
         });
     }
     

common/addons/config-biome/src/main/java/com/dfsek/terra/addons/biome/command/biome/arg/BiomeArgumentParser.java

@@ -22,6 +22,6 @@ public class BiomeArgumentParser implements ArgumentParser<TerraBiome> {
     @Override
     public TerraBiome parse(CommandSender sender, String arg) {
         Player player = (Player) sender;
-        return player.world().getConfig().getRegistry(TerraBiome.class).get(arg);
+        return player.world().getConfig().getRegistry(TerraBiome.class).get(arg).orElse(null);
     }
 }