AccuRevCommandLine accurev = accurevTckTestUtil.getAccuRevCL();
// UpdatingCopy is a workspace rooted at a substream
String workingStream = accurevTckTestUtil.getWorkingStream();
String subStream = accurevTckTestUtil.getDepotName() + "_sub_stream";
accurev.mkstream( workingStream, subStream );
ScmRepository mainRepository = getScmRepository();
ScmProvider provider = getScmManager().getProviderByRepository( mainRepository );
// Create a workspace at the updating copy location backed by the substream