/**
* {@inheritdoc}
*/
public function preProcessSearch(Search $search, Search $relatedSearch, FilterState $state = null)
{
$name = $state ? $state->getName() : $this->getField();
$agg = new TermsAggregation($name);
$agg->setField($this->getField());
$search->addAggregation($agg);
}
