def get_parser(self):
        """
        Returns :class:`monolith.cli.Parser` instance for this
        *ExecutionManager*.
        """
        parser = self.parser_cls(prog=self.prog_name, usage=self.get_usage(),
            stream=self.stderr)
        subparsers = parser.add_subparsers(
            title='subcommands',
        )
        for name, command in self.registry.items():
            cmdparser = subparsers.add_parser(name, help=command.help)
            for argument in command.get_args():
                cmdparser.add_argument(*argument.args, **argument.kwargs)
            command.setup_parser(parser, cmdparser)
            cmdparser.set_defaults(func=command.handle)

        return parser
Returns :class:`monolith.cli.Parser` instance for this
        *ExecutionManager*.