code: static int decompressBBitSlotsWithHardCodes(int[] decompressedSlots,
                  int[] compBlock, int blockSize, int bits) {
                  int compressedBitSize = 0;
                  PForDeltaUnpack128.unpack(decompressedSlots, compBlock, bits);
                  compressedBitSize = bits * blockSize;
  
                  return compressedBitSize;
          }
docs: Decompress the b-bit slots using hardcoded unpack methods
  
  @param decompressedSlots
  the decompressed output
  @param compBlock
  the compressed input block
  @param blockSize
  the block size which is 256 by default
  @param bits
  the value of b
  @return the processed data size (the number of bits in the compressed
  form)