sd_dhcp6_client_attach_event  897 src/network/networkd-link.c         r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
sd_dhcp6_client_attach_event   57 src/systemd/sd-dhcp6-client.h int sd_dhcp6_client_attach_event(sd_dhcp6_client *client, sd_event *event,