return null;
}
// confirm working set exists and use it
ArrayList workingSetCol = new ArrayList(scopes.length);
for (int s = 0; s < scopes.length; s++) {
WorkingSet ws = wsmgr.getWorkingSet(scopes[s]);
if (ws != null) {
workingSetCol.add(ws);
}
}
if (workingSetCol.size() == 0) {