public function ImmutableInvalidation::getExpression in Purge 8.3

Get the invalidation expression.

Return value

mixed|null Mixed expression (or NULL) that describes what needs to be invalidated.

Overrides ImmutableInvalidationBase::getExpression

File

src/Plugin/Purge/Invalidation/ImmutableInvalidation.php, line 44

Class

ImmutableInvalidation

Provides the immutable invalidation object.

Namespace

Drupal\purge\Plugin\Purge\Invalidation

Code

public function getExpression() {
  return $this->invalidation
    ->getExpression();
}