/**
  * This field contains a serialized value which converts to an array,
  * the parent function will through an error since it's expecting
  * a string and wont't typecast or validate the data type. This
  * override is meant to avoid the escape functionality for this
  * specific field.
  *
  * @param $string
  * @return array|string
  */
 protected function _escape($string)
 {
     return !is_array($string) ? parent::_escape($string) : $string;
 }