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update deps & install rector

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Dominik Liebler
2019-12-14 12:50:05 +01:00
parent 04acce6759
commit 579a5ac946
87 changed files with 2432 additions and 786 deletions
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5
Creational/Singleton/Singleton.php
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@@ -4,10 +4,7 @@ namespace DesignPatterns\Creational\Singleton;
final class Singleton
{
/**
* @var Singleton
*/
private static $instance;
private static ?Singleton $instance = null;
/**
* gets the instance via lazy initialization (created on first usage)