Add setBitmask to Chunk

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

@@ -76,6 +76,11 @@ public class BaseChunk implements Chunk {
         return bitmask;
     }
 
+    @Override
+    public void setBitmask(int bitmask) {
+        this.bitmask = bitmask;
+    }
+
     @Override
     @Nullable
     public BitSet getChunkMask() {

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

@@ -37,6 +37,8 @@ public interface Chunk {
      */
     int getBitmask();
 
+    void setBitmask(int bitmask);
+
     /**
      * @return chunk section bit mask, only non-null available for 1.17+ chunks
      * @see #getBitmask()