Where is the Bonobo::PersistStorage stock implementation?

[ERDI Gergo <cactus cactus rulez org>]

I can't see bonobo-persist-storage.* in libbonobo/bonobo. Where is it
moved? 

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   .--= ULLA! =---------------------.   `We are not here to give users what
   \     http://cactus.rulez.org     \   they want'  -- RMS, at GUADEC 2001
    `---= cactus cactus rulez org =---'
Szabadság, szerelem -- ext2 kell nekem