protected function handlePreinit($locale, $domain) {
		if (! empty($this->preinitLocales)) {
			$locale = array_unique(array_merge(
				(array) $locale, 
				$this->preinitLocales
			));
		}

		if (! empty($this->preinitDomains)) {
			$domain = array_unique(array_merge(
				(array) $domain,
				$this->preinitDomains
			));
		}
		
		$this->preinitNeed = false;
		
		return [$locale, $domain];
	}