# Package org.apache.poi.hslf.util

- Class Summary
  Class | Description
  --- | ---
  MutableByteArrayOutputStream | This class doesn't work yet, but is here to show the idea of a ByteArrayOutputStream where you can track how many bytes you've already written, and go back and write over a previous part of the stream
  SystemTimeUtils | A helper class for dealing with SystemTime Structs, as defined at http://msdn.microsoft.com/library/en-us/sysinfo/base/systemtime_str.asp .

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