public function has(string $key): bool {
		foreach ($this->dbtextCollections as $dbtextCollection) {
			if ($dbtextCollection->has($key)) {
				return true;
			}
		}

		return false;
	}
public function has(string $key): bool {
		foreach ($this->dbtextCollections as $dbtextCollection) {
			if ($dbtextCollection->has($key)) {
				return true;
			}
		}

		return false;
	}
{@inheritDoc}
@see \dbtext\model\DbtextCollection::has()