ACTION_RUNLEVEL4 2750 src/systemctl/systemctl.c         [ACTION_RUNLEVEL4]    = { SPECIAL_RUNLEVEL4_TARGET,    NULL,           "isolate" },
ACTION_RUNLEVEL4 6504 src/systemctl/systemctl.c                 { '4', ACTION_RUNLEVEL4 },
ACTION_RUNLEVEL4 6664 src/systemctl/systemctl.c                 [ACTION_RUNLEVEL4] = '4',
ACTION_RUNLEVEL4 7146 src/systemctl/systemctl.c         case ACTION_RUNLEVEL4: