/**
  * Send a batch request
  *
  * @access public
  * @return array|false
  */
 public function send()
 {
     $this->isBatch = false;
     $this->client->batchSend();
     if ($this->client->error) {
         $this->error = $this->client->error;
         return false;
     }
     $response = json_decode($this->client->output, true);
     $result = [];
     foreach ($response as $item) {
         $result[] = isset($item['result']) ? $item['result'] : $item['error'];
     }
     return $result;
 }