Данные в глубине массива

Добрый вечер. Подскажите, как получить данные из такого вида массива?

IPS\nexus\Invoice\ItemsIterator Object
(
    [currency] => USD
    [storage:ArrayIterator:private] => Array
        (
            [0] => Array
                (
                    [act] => new
                    [app] => nexus
                    [type] => package
                    [cost] => 3.00
                    [tax] => 
                    [quantity] => 3
                    [itemName] => Услуга #1
                    [itemID] => 1
                    [physical] => 
                    [methods] => *
                    [cfields] => Array
                        (
                            [1] => 
                        )

                    [extra] => 
                )

        )

)

Нужно добраться до 

		[act] => new
                    [app] => nexus
                    [type] => package
                    [cost] => 3.00
                    [tax] => 
                    [quantity] => 3
                    [itemName] => Услуга #1
                    [itemID] => 1
                    [physical] => 
                    [methods] => *
                    [cfields] => Array
                        (
                            [1] => 
                        )

                    [extra] =>