src/StatementClient.php
public function close()
    {
        $uri = $this->current()->getNextUri();
        if (!is_null($uri)) {
            $this->client->deleteAsync($uri)->wait();
        }
        $this->closed = true;
    }
public function close()
    {
        $uri = $this->current()->getNextUri();
        if (!is_null($uri)) {
            $this->client->deleteAsync($uri)->wait();
        }
        $this->closed = true;
    }
close
HTTP method DELETE