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- <?php
- namespace Drupal\Core\Config\Schema;
- use Drupal\Core\TypedData\ListDataDefinition;
- /**
- * A typed data definition class for defining sequences in configuration.
- */
- class SequenceDataDefinition extends ListDataDefinition {
- /**
- * Gets the description of how the sequence should be sorted.
- *
- * Only the top level of the array should be sorted. Top-level keys should be
- * discarded when using 'value' sorting. If the sequence is an associative
- * array 'key' sorting is recommended, if not 'value' sorting is recommended.
- *
- * @return string|null
- * May be 'key' (to sort by key), 'value' (to sort by value, discarding
- * keys), or NULL (if the schema does not describe how the sequence should
- * be sorted).
- */
- public function getOrderBy() {
- return isset($this->definition['orderby']) ? $this->definition['orderby'] : NULL;
- }
- }
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