ElasticSearcher\Abstracts\AbstractQuery::searchInIndices PHP Method

    protected function searchInIndices(array $indices)
    {
        foreach ($indices as $index) {
            $index = $this->searcher->indicesManager()->getRegistered($index);
            $this->indices[] = $index->getInternalName();
        }
        // Remove doubles.
        $this->indices = array_unique($this->indices);
    }