Returns the page to go to if the user cancels the action.
string|array This can be either:
If the 'destination' query parameter is set in the URL when viewing a confirmation form, that value will be used instead of this path.
Overrides ConfirmFormBase::getCancelPath
protected function getCancelPath() {
return $this->entityManager
->getAdminPath($this->instance->entity_type, $this->instance->bundle) . '/fields';
}