Cake\ElasticSearch\FilterBuilder::bool PHP 메소드

Returns a bool filter that can be chained with the addMust(), addShould() and addMustNot() methods.

또한 보기: http://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-filter.html

public bool ( ) : Elastica\Filter\BoolFilter
리턴	Elastica\Filter\BoolFilter

    public function bool()
    {
        return new Filter\BoolFilter();
    }

FilterBuilder