def add_global_asset(self, fname, content, before=None):
        self._store.add_asset(fname, content)
        self.use_global_asset(fname, before)
Eventually this method should be invoked when generation is called at
dataset/ETHPy150Open zoofIO/flexx/flexx/app/assetstore.py/SessionAssets.add_global_asset--crossover with--dataset/ETHPy150Open Mindwerks/worldengine/worldengine/cli/main.py/generate_plates