What is the difference between admintools command_host restart and condrestart

In /etc/init.d/verticad I see two options that puzzle me. I presume restart will restart vertica on the node where the command is used. But what does condrestart do?

case "$1" in
    start)
        ;;
    stop)
        ;;
    status)
        mode=status
        ;;
    restart)
        ;;
    condrestart)
        ;;