InstanceIdentifierBuilder<VpnInstance> idBuilder = InstanceIdentifier.builder(VpnInstances.class)
.child(VpnInstance.class, new VpnInstanceKey(vpnName));
InstanceIdentifierBuilder<VpnInstance> idBuilder = InstanceIdentifier.builder(VpnInstances.class)
.child(VpnInstance.class, new VpnInstanceKey(vpnName));