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“ .lamiced noisicerp hgih sesu gnidocoeG .erots nac taolf a naht noisicerp rehgih sevig gnidocoeG .oot epyt atad egarots eulav noisicerp rehgih a sdeen tniop oeg eht kniht Ihttp://code.google.com/p/googleappengine/issues/detail?id=4659 ”
“ :dnuorakrow rehtonahttp://googleappengine.blogspot.com/2009/07/writing-custom-property-classes.html ”
“ :BD rof did yeht ekil tsuj BDN ni slamiced esu ot ssalc motsuc etaerc ot woh tsop golb a hsilbup thgim elgooG tsael tAhttp://googleappengine.blogspot.nl/2009/07/writing-custom-property-classes.html ”