'List the UUIDs of our cluster\'s VIOSes on this host.
(If a VIOS is not on this host, we can\'t interact with it, even if its
URI and therefore its UUID happen to be available in the pypowervm
wrapper.)
:return: A list of VIOS UUID strings.'

@property
def _vios_uuids(self):

    ret = []
    for n in self._clust.nodes:
        if (not (n.vios_uuid and n.vios_uri)):
            continue
        if (self._host_uuid == pvm_u.get_req_path_uuid(n.vios_uri, preserve_case=True, root=True)):
            ret.append(n.vios_uuid)
    return ret
