How to use the pgspecial.namedqueries.NamedQueries function in pgspecial

prompt=None,
        prompt_dsn=None,
        auto_vertical_output=False,
        warn=None,
    ):

        self.force_passwd_prompt = force_passwd_prompt
        self.never_passwd_prompt = never_passwd_prompt
        self.pgexecute = pgexecute
        self.dsn_alias = None
        self.watch_command = None

        # Load config.
        c = self.config = get_config(pgclirc_file)

        NamedQueries.instance = NamedQueries.from_config(self.config)

        self.logger = logging.getLogger(__name__)
        self.initialize_logging()

        self.set_default_pager(c)
        self.output_file = None
        self.pgspecial = PGSpecial()

        self.multi_line = c["main"].as_bool("multi_line")
        self.multiline_mode = c["main"].get("multi_line_mode", "psql")
        self.vi_mode = c["main"].as_bool("vi")
        self.auto_expand = auto_vertical_output or c["main"].as_bool("auto_expand")
        self.expanded_output = c["main"].as_bool("expand")
        self.pgspecial.timing_enabled = c["main"].as_bool("timing")
        if row_limit is not None:
            self.row_limit = row_limit

def from_config(cls, config):
        return NamedQueries(config)

def delete_named_query(pattern, **_):
    """Delete an existing named query.
    """
    usage = 'Syntax: \\nd name.\n\n' + NamedQueries.instance.usage
    if not pattern:
        return [(None, None, None, usage)]

    status = NamedQueries.instance.delete(pattern)

    return [(None, None, None, status)]