public ContentEntityBase::__sleep()
Overrides Entity::__sleep
public function __sleep() { // Get the values of instantiated field objects, only serialize the values. foreach ($this->fields as $name => $fields) { foreach ($fields as $langcode => $field) { $this->values[$name][$langcode] = $field->getValue(); } } $this->fields = array(); $this->fieldDefinitions = NULL; $this->languages = NULL; $this->clearTranslationCache(); return parent::__sleep(); }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Entity!ContentEntityBase.php/function/ContentEntityBase::__sleep/8.1.x