add file getter for partial resotre
add file getter for partial resotre

shabtaisharon/ds3_net_sdk,shabtaisharon/ds3_net_sdk,shabtaisharon/ds3_net_sdk,SpectraLogic/ds3_net_sdk,RachelTucker/ds3_net_sdk,SpectraLogic/ds3_net_sdk,RachelTucker/ds3_net_sdk,RachelTucker/ds3_net_sdk,SpectraLogic/ds3_net_sdk