Libgsf: Is it possible to write different child files into a zip file with different compression ratios

[Fridrich Strba <fridrich strba bluewin ch>]

Hello, I would like to ask whether it is possible to write into a zip 
file one child file with compression "stored" and other with compression 
"deflated" using libgsf.

Trying to write OOo files where the first file included should be 
uncompressed "mimetype" file and all other are compressed.

Thanks for the advice

Fridrich

P.S. I tried using the gsf_outfile_zip_set_compression_method function, 
but it seems not to work if the parent file is already open.
Maybe I did not understand everything. That is why I ask