def inject_parser_options(parser, name):
    """Inject argument parser options (flags).

        1. Be nice and prepend all options and destinations with
        `~.common.option_namespace` and `~common.dest_namespace`.

        2. Inject options (flags) only. Positional arguments are not
        allowed, as this would break the CLI.

        :param ArgumentParser parser: (Almost) top-level CLI parser.
        :param str name: Unique plugin name.

        """
