/**
@class wxZlibOutputStream
- @wxheader{zstream.h}
This stream compresses all data written to it. The compressed output can be
in zlib or gzip format.
/**
@class wxZlibInputStream
- @wxheader{zstream.h}
This filter stream decompresses a stream that is in zlib or gzip format.
Note that reading the gzip format requires zlib version 1.2.1 or greater,