fix some refactor errors

common/addons/palette/src/main/java/com/dfsek/terra/addons/palette/PaletteRegistry.java

@@ -0,0 +1,21 @@
+package com.dfsek.terra.addons.palette;
+
+import com.dfsek.terra.api.TerraPlugin;
+import com.dfsek.terra.api.world.generator.Palette;
+import com.dfsek.terra.api.world.palette.PaletteImpl;
+import com.dfsek.terra.registry.OpenRegistryImpl;
+
+public class PaletteRegistry extends OpenRegistryImpl<Palette> {
+    private final TerraPlugin main;
+
+    public PaletteRegistry(TerraPlugin main) {
+        this.main = main;
+    }
+
+    @Override
+    public Palette get(String identifier) {
+        if(identifier.startsWith("BLOCK:"))
+            return new PaletteImpl.Singleton(main.getWorldHandle().createBlockData(identifier.substring(6))); // Return single palette for BLOCK: shortcut.
+        return super.get(identifier);
+    }
+}