<?php /** * Singleton class trait. * * @package Automattic/WooCommerce/Utilities */ namespace Automattic\WooCommerce\RestApi\Utilities; /** * Singleton trait. */ trait SingletonTrait { /** * The single instance of the class. * * @var object */ protected static $instance = null; /** * Constructor * * @return void */ protected function __construct() {} /** * Get class instance. * * @return object Instance. */ final public static function instance() { if ( null === static::$instance ) { static::$instance = new static(); } return static::$instance; } /** * Prevent cloning. */ private function __clone() {} /** * Prevent unserializing. */ private function __wakeup() {} }