if self.interface_options.aggregate: return "aggregate"
elif self.interface_options.slicemgr: return "slicemgr"
elif self.interface_options.registry: return "registry"
if self.interface_options.aggregate: return "aggregate"
elif self.interface_options.slicemgr: return "slicemgr"
elif self.interface_options.registry: return "registry"