VDC_LC_DETACHING
if (vdc->lifecycle == VDC_LC_DETACHING)
ASSERT(vdcp->lifecycle != VDC_LC_DETACHING);
if (vdcp->lifecycle == VDC_LC_DETACHING) {
if (vdcp->lifecycle == VDC_LC_DETACHING) {
vdc->lifecycle = VDC_LC_DETACHING;