public static function setUpBeforeClass()
 {
     self::$class_instance = Simply_Static::init(__FILE__);
 }
<?php

if (!defined('ABSPATH')) {
    exit;
}
// Exit if accessed directly
/**
 * Plugin Name:       Simply Static S3
 * Plugin URI:        https://github.com/kennu/simply-static-s3
 * Description:       Produces a static HTML version of your WordPress install, adjusts URLs accordingly and deploys to Amazon S3.
 * Version:           2.0.0
 * Author:            Kenneth Falck (based on Code of Conduct)
 * Author URI:        https://github.com/kennu
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       simply-static-s3
 * Domain Path:       /languages
 */
require plugin_dir_path(__FILE__) . 'includes/class-simply-static.php';
Simply_Static::init(__FILE__);