258   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in GetDescriptor()
264   if (ValueGuard stream_guard = StreamIsValid()) {  in GetDescriptor()
281   ValueGuard stream_guard = StreamIsValid();  in GetStream()
283     if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in GetStream()
389   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in SeekFromStart()
401   if (ValueGuard stream_guard = StreamIsValid()) {  in SeekFromStart()
420   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in SeekFromCurrent()
432   if (ValueGuard stream_guard = StreamIsValid()) {  in SeekFromCurrent()
451   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in SeekFromEnd()
463   if (ValueGuard stream_guard = StreamIsValid()) {  in SeekFromEnd()
481   if (ValueGuard stream_guard = StreamIsValid()) {  in Flush()
488     ValueGuard descriptor_guard = DescriptorIsValid();  in Flush()
497   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in Sync()
552   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in Read()
563   if (ValueGuard file_lock = StreamIsValid()) {  in Read()
616   if (ValueGuard descriptor_guard = DescriptorIsValid()) {  in Write()
627   if (ValueGuard stream_guard = StreamIsValid()) {  in Write()