/**
  * Updates a statement
  *
  * @param $input
  * @param $id
  *
  * @return array
  */
 public function update($input, $id)
 {
     $statement = $this->statement->findOrFail($id);
     $statement->update(["period" => $input->period, "due_date" => $input->due_date, "deadline" => $input->deadline, "has_real_dates" => $input->has_real_dates, "credit_card_id" => $input->credit_card_id]);
     return ["id" => $statement->id];
 }