@HiveDecimalWritableVersionV2
  @SuppressFBWarnings(value = "EI_EXPOSE_REP", justification = "Expose internal rep for efficiency")
  public byte[] bigIntegerBytesInternalScratchBuffer() {
    return internalScratchBuffer;
  }
Returns the scratch array containing the result after a call to bigIntegerBytesInternalScratch.
storage-api/src/java/org/apache/hadoop/hive/serde2/io/HiveDecimalWritable.java