private function normalizeTraversable($data, $depth = 0) {
		if (is_array($data) || $data instanceof \Traversable) {
			return $this->normalizeTraversableElement($data, $depth);
		}

		return null;
	}
private function normalizeTraversable($data, $depth = 0) {
		if (is_array($data) || $data instanceof \Traversable) {
			return $this->normalizeTraversableElement($data, $depth);
		}

		return null;
	}
private function normalizeTraversable ( $ data , $ depth = 0 ) { if ( is_array ( $ data ) || $ data instanceof \ Traversable ) { return $ this -> normalizeTraversableElement ( $ data , $ depth ) ; } return null ; }
Returns an array containing normalized elements

@used-by InterfaSys\LogNormalizer\Normalizer::normalize

@param $data
@param int $depth

@return array|null
Returns an array containing normalized elements