code: public BatchMutation<K> addSuperCounterInsertion(K key, List<String> columnFamilies, 
        CounterSuperColumn counterSuperColumn) {
      Mutation mutation = new Mutation();
      mutation.setColumn_or_supercolumn(new ColumnOrSuperColumn().setCounter_super_column(counterSuperColumn));
      addMutation(key, columnFamilies, mutation);
      return this;
    }
docs: Add a SuperColumnCounter insertion (or update)