public function validateForm(array &$form, FormStateInterface $form_state) {
parent::validateForm($form, $form_state);
$code = $form_state->getValue('code');
$return = $this->serializer->deserializeForm($code);
$fillpdf_form = $return['form'];
$fields = $return['fields'];
if (!is_object($fillpdf_form) || !count($fields)) {
$form_state->setErrorByName('code', $this->t('There was a problem processing your FillPDF form code. Please do a fresh export from the source and try pasting it again.'));
}
else {
$form_state->setValue('mappings', [
'form' => $fillpdf_form,
'fields' => $fields,
]);
}
}
