make Handle separate interface

src/main/java/com/dfsek/terra/api/bukkit/BukkitChunk.java

@@ -18,4 +18,9 @@ public class BukkitChunk implements Chunk {
     public int getZ() {
         return delegate.getZ();
     }
+
+    @Override
+    public org.bukkit.Chunk getHandle() {
+        return delegate;
+    }
 }

src/main/java/com/dfsek/terra/api/generic/BlockData.java

@@ -1,5 +1,4 @@
 package com.dfsek.terra.api.generic;
 
-public interface BlockData {
+public interface BlockData extends Handle {
-    Object getHandle();
 }

src/main/java/com/dfsek/terra/api/generic/Handle.java

@@ -0,0 +1,8 @@
+package com.dfsek.terra.api.generic;
+
+/**
+ * An interface that contains a platform delegate.
+ */
+public interface Handle {
+    Object getHandle();
+}

src/main/java/com/dfsek/terra/api/generic/world/BiomeGrid.java

@@ -1,11 +1,10 @@
 package com.dfsek.terra.api.generic.world;
 
+import com.dfsek.terra.api.generic.Handle;
 import org.bukkit.block.Biome;
 import org.jetbrains.annotations.NotNull;
 
-public interface BiomeGrid {
+public interface BiomeGrid extends Handle {
-    Object getHandle();
-
     /**
      * Get biome at x, z within chunk being generated
      *

src/main/java/com/dfsek/terra/api/generic/world/Block.java

@@ -1,4 +1,6 @@
 package com.dfsek.terra.api.generic.world;
 
-public interface Block {
+import com.dfsek.terra.api.generic.Handle;
+
+public interface Block extends Handle {
 }

src/main/java/com/dfsek/terra/api/generic/world/Chunk.java

@@ -1,6 +1,8 @@
 package com.dfsek.terra.api.generic.world;
 
-public interface Chunk {
+import com.dfsek.terra.api.generic.Handle;
+
+public interface Chunk extends Handle {
     int getX();
 
     int getZ();

src/main/java/com/dfsek/terra/api/generic/world/World.java

@@ -1,7 +1,7 @@
 package com.dfsek.terra.api.generic.world;
 
-public interface World {
+import com.dfsek.terra.api.generic.Handle;
-    long getSeed();
 
-    Object getHandle();
+public interface World extends Handle {
+    long getSeed();
 }