code: private BasicDBList getSplitData(DBCollection collection) {
  
          final DBObject cmd = BasicDBObjectBuilder.start("splitVector", collection.getFullName())
                  .add("keyPattern", new BasicDBObject(MONGO_DEFAULT_ID, 1))
                  .add("force", false)
                  .add("maxChunkSize", splitSize)
                  .get();
  
          CommandResult splitVectorResult = collection.getDB().getSisterDB("admin").command(cmd);
          return (BasicDBList) splitVectorResult.get(SPLIT_KEYS);
  
      }
docs: Gets split data.
  
  @param collection the collection
  @return the split data