IsKnownToVFS
bool IsKnownToVFS() const;
if (node->IsKnownToVFS()) {
if (node->IsKnownToVFS()) {
inline bool IsKnownToVFS() const;
const bool isKnownToVFS = node->IsKnownToVFS();
bool IsKnownToVFS() const { return fIsKnownToVFS; }