<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_plugin_parser(self, plugin_obj):
 """ Creates a plugin argument parser. `plugin_obj` ``Plugin`` object. Returns ``FocusArgParser`` object. """


        prog_name = 'focus ' + plugin_obj.command
        desc = (plugin_obj.__doc__ or '').strip()

        parser = FocusArgParser(prog=prog_name, description=desc)
        plugin_obj.setup_parser(parser)

        return parser