public function ImmutableInvalidationInterface::getExpression in Purge 8.3

Get the invalidation expression.

Return value

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

1 method overrides ImmutableInvalidationInterface::getExpression()

ImmutableInvalidationBase::getExpression in src/Plugin/Purge/Invalidation/ImmutableInvalidationBase.php

Get the invalidation expression.

File

src/Plugin/Purge/Invalidation/ImmutableInvalidationInterface.php, line 31

Class

ImmutableInvalidationInterface

Describes the immutable invalidation.

Namespace

Drupal\purge\Plugin\Purge\Invalidation

Code

public function getExpression();