if (users != null) {
draggedFlavor = TransferableUsers.FLAVOR;
return new TransferableUsers(users);
} else if (groups != null) {
draggedFlavor = TransferableGroups.FLAVOR;
return new TransferableGroups(groups);
} else if (groupMembers != null) {
draggedFlavor = TransferableGroupMembers.FLAVOR;
return new TransferableGroupMembers(groupMembers);
}
draggedFlavor = null;