public function tweets($limit = 1000)
    { 
        $params = [
            'index' => $this->_esindex,
            'type' => $this->_estype,
            'size' => $limit,
            'body' => [
                'query' => [
                    'match_all' => []
                ]
            ]
        ];
        $query = $this->_es->search($params);
        if ($query['hits']['total'] >= 1)
            $result = $query['hits']['hits'];
        else
            $result = [];
        return $result;
    }