code: public final int decompress(byte[] src, int srcOff, int srcLen, byte[] dest, int destOff) {
      return decompress(src, srcOff, srcLen, dest, destOff, dest.length - destOff);
    }
docs: Convenience method, equivalent to calling
  {@link #decompress(byte[], int, int, byte[], int, int) decompress(src, srcOff, srcLen, dest, destOff, dest.length - destOff)}.
  
  @param src the compressed data
  @param srcOff the start offset in src
  @param srcLen the exact size of the compressed data
  @param dest the destination buffer to store the decompressed data
  @param destOff the start offset in dest
  @return the original input size
  @throws LZ4Exception if dest is too small