<?php

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/**

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* Singleton class trait.

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*

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* @package WooCommerce\Utilities

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*/

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namespace Automattic\WooCommerce\RestApi\Utilities;

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/**

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* Singleton trait.

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*/

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trait SingletonTrait {

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/**

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* The single instance of the class.

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*

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* @var object

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*/

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protected static $instance = null;

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/**

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* Constructor

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*

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* @return void

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*/

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protected function __construct() {}

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/**

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* Get class instance.

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*

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* @return object Instance.

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*/

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final public static function instance() {

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if ( null === static::$instance ) {

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static::$instance = new static();

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}

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return static::$instance;

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}

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/**

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* Prevent cloning.

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*/

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private function __clone() {}

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/**

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* Prevent unserializing.

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*/

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final public function __wakeup() {

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wc_doing_it_wrong( __FUNCTION__, __( 'Unserializing instances of this class is forbidden.', 'woocommerce' ), '4.6' );

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die();

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}

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}

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