ContentEntityForm::init

protected ContentEntityForm::init(FormStateInterface $form_state)

protected function init(FormStateInterface $form_state) {
  // Ensure we act on the translation object corresponding to the current form
  // language.
  $this->initFormLangcodes($form_state);
  $langcode = $this->getFormLangcode($form_state);
  $this->entity = $this->entity->hasTranslation($langcode) ? $this->entity->getTranslation($langcode) : $this->entity->addTranslation($langcode);

  $form_display = EntityFormDisplay::collectRenderDisplay($this->entity, $this->getOperation());
  $this->setFormDisplay($form_display, $form_state);

  parent::init($form_state);
}