def _add_help(self):
        help = Arg('help')
        help.action = self._display_help
        help.help = 'Display help information'

        has_short = False
        for arg in set(self._args_map.values()):
            if arg.long == '--help':
                return
            if arg.short == '-h':
                has_short = True
        if not has_short:
            help.short = '-h'
        help.long = '--help'
        self.add_arg(help)
Boolean expression.  Test for presence of all keys in jsonb
dataset/ETHPy150Open kbknapp/Clapp-py/clapp/clapp.py/App._add_help--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/dialects/postgresql/hstore.py/HSTORE.Comparator.has_all