Save all data from a banks_manager

        :param BanksManager banks_manager: BanksManager that your banks data will be persisted

def save(self, banks_manager):
        """
        Save all data from a banks_manager

        :param BanksManager banks_manager: BanksManager that your banks data will be persisted
        """
        self.banks_files.delete_all_banks()
        self.banks_files.save(banks_manager)
        self.index_file.save(banks_manager)