def register_postparsing_hook(self, func: Callable[[plugin.PostparsingData], plugin.PostparsingData]) -> None:
        """Register a function to be called after parsing user input but before running the command"""
        self._validate_postparsing_callable(func)
        self._postparsing_hooks.append(func)
Register a function to be called after parsing user input but before running the command