public function ImmutableInvalidationBase::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 ImmutableInvalidationInterface::getExpression

1 method overrides ImmutableInvalidationBase::getExpression()

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

Get the invalidation expression.

File

src/Plugin/Purge/Invalidation/ImmutableInvalidationBase.php, line 83

Class

ImmutableInvalidationBase

Provides base implementations the immutable invalidation object.

Namespace

Drupal\purge\Plugin\Purge\Invalidation

Code

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