Add setSections to Chunk

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/BaseChunk.java

@@ -14,7 +14,7 @@ public class BaseChunk implements Chunk {
     protected boolean ignoreOldLightData;
     protected BitSet chunkSectionBitSet;
     protected int bitmask;
-    protected final ChunkSection[] sections;
+    protected ChunkSection[] sections;
     protected int[] biomeData;
     protected CompoundTag heightMap;
     protected final List<CompoundTag> blockEntities;
@@ -97,6 +97,11 @@ public class BaseChunk implements Chunk {
         return sections;
     }
 
+    @Override
+    public void setSections(ChunkSection[] sections) {
+        this.sections = sections;
+    }
+
     @Override
     @Nullable
     public int[] getBiomeData() {

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/Chunk.java

@@ -50,6 +50,8 @@ public interface Chunk {
 
     ChunkSection[] getSections();
 
+    void setSections(ChunkSection[] sections);
+
     @Nullable
     int[] getBiomeData();