Use PHP 7.4 featers and PHP 8 polyfills
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@ -43,7 +43,7 @@ trait Singleton {
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* @since 2.0.0
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* @return void
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*/
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public function init() {
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public function init(): void {
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$this->has_parents() && method_exists(get_parent_class($this), 'init') && parent::init();
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}
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