/**
  * Sets the defaults for the billing form according to the attendee's details.
  *
  * @param int | \EE_Attendee $attendee
  */
 public function populate_from_attendee($attendee)
 {
     parent::populate_from_attendee($attendee);
     $this->populate_defaults(array('state' => $attendee->state_abbrev(), 'country' => $attendee->country_ID()));
 }