Force refresh on a IRemoteFile?

Folks:

Does anyone know of a way to force the RemoteFileSubSystem to refresh
the cached information it has about an IRemoteFile that refers to an IFS
file?

I'm trying to invoke a file edit session by getting an IRemoteFile ...

rfs = subsystem.getRemoteFileSubSystem();

String fullPath = fixIfsFilename(directory + rfs.getSeparator() + filename);

try {
IRemoteFile remoteFile = rfs.getRemoteFileObject(fullPath);
remoteFile.markAllPropertiesStale();

boolean fileExists = remoteFile.exists();
// more stuff

Problem is, if the file was previously created in the IFS, and then was
deleted, the exists() method on the remoteFile returns true.

I would like to figure out a way to have it re-query the IFS to
determine the files actual existence.

Thanks!

david