private void setPermission() {
   if (mUserInfo.roles == null || mUserInfo.roles.size() < 1) {
     mLayout.showOperator(false, getString(R.string.none));
   } else {
     int size = mUserInfo.roles.size();
     size--;
     if (size == 0) {
       mLayout.showOperator(true, mUserInfo.roles.get(0).description);
     } else if (size > 0) {
       mLayout.showOperator(
           true, mUserInfo.roles.get(size).description + " + " + mUserInfo.roles.size());
     }
   }
 }