src/app/dbtext/model/DbtextService.php
public function tc($ns, N2nLocale ...$n2nLocales): DbtextCollection {
		if (empty($n2nLocales)) {
			$n2nLocales[] = $this->n2nContext->getN2nLocale();
		}
		
		if (!is_array($ns)) {
			return $this->getOrCreateBasicDbCollection($ns, ...$n2nLocales);
		} elseif (count($ns) === 1) {
			return $this->getOrCreateBasicDbCollection(reset($ns), ...$n2nLocales);
		}
		
		$dbtextCollections = array();
		foreach ($ns as $namespace) {
			$dbtextCollections[] = $this->getOrCreateBasicDbCollection($namespace, ...$n2nLocales);
		}

		return new GroupedDbtextCollection($dbtextCollections, $n2nLocales);
	}
public function tc($ns, N2nLocale ...$n2nLocales): DbtextCollection {
		if (empty($n2nLocales)) {
			$n2nLocales[] = $this->n2nContext->getN2nLocale();
		}
		
		if (!is_array($ns)) {
			return $this->getOrCreateBasicDbCollection($ns, ...$n2nLocales);
		} elseif (count($ns) === 1) {
			return $this->getOrCreateBasicDbCollection(reset($ns), ...$n2nLocales);
		}
		
		$dbtextCollections = array();
		foreach ($ns as $namespace) {
			$dbtextCollections[] = $this->getOrCreateBasicDbCollection($namespace, ...$n2nLocales);
		}

		return new GroupedDbtextCollection($dbtextCollections, $n2nLocales);
	}
Returns fitting {@see TextCollection}

@param string|string[] $ns
@return DbtextCollection