func validateFCVolumeSource(fc *core.FCVolumeSource, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	if len(fc.TargetWWNs) < 1 && len(fc.WWIDs) < 1 {
		allErrs = append(allErrs, field.Required(fldPath.Child("targetWWNs"), "must specify either targetWWNs or wwids, but not both"))
	}

	if len(fc.TargetWWNs) != 0 && len(fc.WWIDs) != 0 {

	//
	// ptr, len, cap := s
	// len += 3
	// if uint(len) > uint(cap) {
	//     ptr, len, cap = growslice(ptr, len, cap, 3, typ)
	//     Note that len is unmodified by growslice.
	// }
	// // with write barriers, if needed:
	// *(ptr+(len-3)) = e1
	// *(ptr+(len-2)) = e2
	// *(ptr+(len-1)) = e3
	// return makeslice(ptr, len, cap)
	//
	//