def get_model(self):
        if self.tree_store:
            return self.tree_store 
        else:
            return None
Takes a pymarc.Record object and returns extracted information as a
dataset/ETHPy150Open anandology/pyjamas/pygtkweb/demos/046-cellrenderer.py/InfoModel.get_model--crossover with--dataset/ETHPy150Open gwu-libraries/launchpad/lp/ui/marc.py/extract