function getPost($postId, array $fields = array())
    {
        if (empty($fields)) {
            $params = array(1, $this->username, $this->password, $postId);
        } else {
            $params = array(1, $this->username, $this->password, $postId, $fields);
        }

        return $this->sendRequest('wp.getPost', $params);
    }