wikimedia/mediawiki-extensions-CirrusSearch

<?php

namespace CirrusSearch\Query\Builder;

/**
 * A filter added as context to the search query
 */
interface ContextualFilter {
    /**
     * @param FilterBuilder $builder
     */
    public function populate( FilterBuilder $builder );

    /**
     * @return int[]|null a list of namespace, an empty array for all namespaces or null
     * if no extra namespaces are required.
     */
    public function requiredNamespaces();
}