[Libvir] [Q]Will virConnectNumOfNetworks and virConnectNumOfDefinedNetworks be supported by Xen ?

Hi, When I use virt-manager that is connected by xen, the following error is given at every monitoring. libvir: Error : this function is not supported by the hypervisor: virConnectNumOfNetworks libvir: Error : this function is not supported by the hypervisor: virConnectNumOfDefinedNetworks Therefore I have a question. Will virConnectNumOfNetworks and virConnectNumOfDefinedNetworks be supported by Xen ? When is it if supported ? Thanks, Shigeki Sakamoto.