@Override
 protected void tearDown() throws Exception {
   Item.EXTENDED_READ.setEnabled(enabled);
   super.tearDown();
 }
 /** alice: Job/Configure+Read bob: Job/Read charlie: Job/ExtendedRead+Read */
 private void setPermissionEnabled(boolean enabled) throws Exception {
   Item.EXTENDED_READ.setEnabled(enabled);
 }
 @Override
 protected void setUp() throws Exception {
   super.setUp();
   enabled = Item.EXTENDED_READ.getEnabled();
 }