private function getCompaniesById($id)
 {
     return Company::where('industry_id', $id)->get();
 }
 /**
  * Return all companies owned by given user, ready to be paginated.
  *
  * @param User $user
  *
  * @return mixed
  */
 public function getByUser(User $user)
 {
     return Company::where('user_id', $user->id);
 }