public static function activation_check($version)
 {
     self::$version = $version;
     if (!self::compatible_version()) {
         deactivate_plugins(WCPS_FILE);
         wp_die(__(WCPS_NAME . ' requires WordPress ' . self::$version . ' or higher!', WCPS_TXT));
     }
 }
 public static function activate()
 {
     require_once WCPS_INC . 'helpers/class-version-check.php';
     require_once WCPS_INC . 'helpers/class-dependencies.php';
     if (WooCommerce_Product_Subtitle_Dependencies(WCPS_DEPEN)) {
         WooCommerce_Product_Subtitle_Version_Check::activation_check('3.7');
     } else {
         if (is_plugin_active(WCPS_FILE)) {
             deactivate_plugins(WCPS_FILE);
         }
         wp_die(wc_ps_dependency_message());
     }
 }