for command_trigger, command in self.command_list.copy().items():
        # Pre-check that command is indeed a Command
        if isinstance(command, Command):
            #  Only change reference of Strings
            if isinstance(command.reference, str):
                # Replace valid function name(str) with function reference
                if getattr(self, command.reference):
                    self.command_list[command_trigger].reference = getattr(self, command.reference)