code: def _lookup_symbols(self, symbols_filename):
          
          symbol_lookup = GenewaysSymbols(symbols_filename)
          for action in self.actions:
              action.up_symbol = symbol_lookup.id_to_symbol(action.up)
              action.dn_symbol = symbol_lookup.id_to_symbol(action.dn)
docs: Look up symbols for actions and action mentions