docs: @Override
      synchronized public int encodeIntoCompressedByteBuffer(
              final ByteBuffer targetBuffer,
              final int compressionLevel) {
          targetBuffer.putInt(DHIST_compressedEncodingCookie);
          targetBuffer.putInt(getNumberOfSignificantValueDigits());
          targetBuffer.putLong(configuredHighestToLowestValueRatio);
          return integerValuesHistogram.encodeIntoCompressedByteBuffer(targetBuffer, compressionLevel) + 16;
      }