isDefault() публичный Метод

Note that unless the property is static, this is hard coded to return true, because we are unable to reflect instances of classes, therefore we can be sure that all properties are always declared at compile-time.
public isDefault ( ) : boolean
Результат boolean
 /**
  * {@inheritDoc}
  */
 public function isDefault()
 {
     return $this->betterReflectionProperty->isDefault();
 }