def backward_kill_word(self):
        #self[PrevWordStart:Point].to_clipboard()
        if not self.delete_selection():
            del self[PrevWordStart:Point]
        self.selection_mark=-1
Return an iterator of MapperProperty objects which will render into
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/site-packages/pyreadline/lineeditor/lineobj.py/ReadLineTextBuffer.backward_kill_word--crossover with--dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/orm/mapper.py/Mapper._iterate_polymorphic_properties