* @package WPMUDEV\Hub\Connector */ namespace WPMUDEV\Hub\Connector; defined( 'WPINC' ) || die(); trait Singleton { /** * Instance holder. * * @var static $instance */ private static $instance; /** * Instance obtaining method. * * @since 1.0.0 * * @return static Called class instance. */ public static function get() { $called_class_name = get_called_class(); // Only if not already exist. if ( ! self::$instance instanceof $called_class_name ) { self::$instance = new $called_class_name(); } return self::$instance; } }