docs: private void ensureCapacity(final byte[] next_qualifier, 
        final byte[] next_value) {
      if (qualifier_index + next_qualifier.length >= batched_qualifier.length) {
        batched_qualifier = Arrays.copyOf(batched_qualifier,
            batched_qualifier.length * 2);
      }
      if (value_index + next_value.length >= batched_value.length) {
        batched_value = Arrays.copyOf(batched_value, batched_value.length * 2);
      }
    }