def process_raw(self, raw: dict) -> None:
        """Pre-process raw dict.

        Prepare parameters to work with APIItems.
        """
        raw_ports = {}

        for param in raw:
            port_index = REGEX_PORT_INDEX.search(param).group(0)

            if port_index not in raw_ports:
                raw_ports[port_index] = {}

            name = param.replace(IOPORT + '.I' + port_index + '.', '')
            raw_ports[port_index][name] = raw[param]

        super().process_raw(raw_ports)