[libvirt-users] Does virsh support offline migration?

I saw some docs referred one option "--offline" for "virsh migrate" on the internet, and there was one section called "Offline Migration" in libvirt.org, but i did find this option on my local machine. So, is it libvirt really support offline migration ? Is that because my libvirt is a little older? Is that option "--offline" right? -- Regards, apporc