Returns the next redirect path in a multipage sequence.
string|array Either the next path, or an array of redirect paths.
protected function getNextDestination() {
$next_destination = FieldUI::getNextDestination();
if (empty($next_destination)) {
$next_destination = $this->entityManager
->getAdminPath($this->instance->entity_type, $this->instance->bundle) . '/fields';
}
return $next_destination;
}