public property PurgeInvalidation::$expression_required in Purge 8.3

Required expression.

Whether invalidation objects of this type require a string expression that describes what needs to be purged. If put to FALSE, the fact this type is instantiated is deemed enough information for purgers to execute it.

Type: bool

File

src/Annotation/PurgeInvalidation.php, line 57

Class

PurgeInvalidation

Defines a PurgeInvalidation annotation object.

Namespace

Drupal\purge\Annotation

Code

public $expression_required = TRUE;