How to use the xknx.io.ConnectionConfig function in xknx

def connection_config_routing(self):
        """Return the connection_config if routing is configured."""
        local_ip = self.config[DOMAIN][CONF_KNX_ROUTING].get(CONF_KNX_LOCAL_IP)
        return ConnectionConfig(
            connection_type=ConnectionType.ROUTING, local_ip=local_ip
        )

def connection_config_routing(self):
        """Return the connection_config if routing is configured."""
        local_ip = self.config[DOMAIN][CONF_XKNX_ROUTING].get(CONF_XKNX_LOCAL_IP)
        return ConnectionConfig(
            connection_type=ConnectionType.ROUTING, local_ip=local_ip
        )

def connection_config_routing(self):
        from xknx.io import ConnectionConfig, ConnectionType
        local_ip = \
            self.config[DOMAIN][CONF_XKNX_ROUTING].get(CONF_XKNX_LOCAL_IP)
        return ConnectionConfig(
            connection_type=ConnectionType.ROUTING,
            local_ip=local_ip)

def connection_config_auto(self):
        #pylint: disable=no-self-use
        from xknx.io import ConnectionConfig
        return ConnectionConfig()

def connection_config_auto(self):
        """Return the connection_config if auto is configured."""
        # pylint: disable=no-self-use
        return ConnectionConfig()

def _parse_connection_prefs(self, conn_type: ConnectionType, prefs) -> None:
        connection_config = ConnectionConfig(connection_type=conn_type)
        if hasattr(prefs, '__iter__'):
            for pref, value in prefs.items():
                if pref == "gateway_ip":
                    connection_config.gateway_ip = value
                elif pref == "gateway_port":
                    connection_config.gateway_port = value
                elif pref == "local_ip":
                    connection_config.local_ip = value
        self.xknx.connection_config = connection_config

def connection_config_tunneling(self):
        """Return the connection_config if tunneling is configured."""
        gateway_ip = self.config[DOMAIN][CONF_KNX_TUNNELING].get(CONF_HOST)
        gateway_port = self.config[DOMAIN][CONF_KNX_TUNNELING].get(CONF_PORT)
        local_ip = self.config[DOMAIN][CONF_KNX_TUNNELING].get(CONF_KNX_LOCAL_IP)
        if gateway_port is None:
            gateway_port = DEFAULT_MCAST_PORT
        return ConnectionConfig(
            connection_type=ConnectionType.TUNNELING,
            gateway_ip=gateway_ip,
            gateway_port=gateway_port,
            local_ip=local_ip,
        )