/**
  * Prepare shipment request.
  * Validate and correct request information
  *
  * @param \Magento\Framework\DataObject $request
  * @return void
  */
 protected function _prepareShipmentRequest(\Magento\Framework\DataObject $request)
 {
     $phonePattern = '/[\\s\\_\\-\\(\\)]+/';
     $phoneNumber = $request->getShipperContactPhoneNumber();
     $phoneNumber = preg_replace($phonePattern, '', $phoneNumber);
     $request->setShipperContactPhoneNumber($phoneNumber);
     $phoneNumber = $request->getRecipientContactPhoneNumber();
     $phoneNumber = preg_replace($phonePattern, '', $phoneNumber);
     $request->setRecipientContactPhoneNumber($phoneNumber);
 }