从对象内的数组获取数组键（protected）-value（来自RTM-php的响应）？

When using php library for RTM (https://github.com/bartosz-maciaszek/php-rtm), I am getting a response for a particular tasks-list like this:

Rtm\DataContainer Object
(
    [attributes:Rtm\DataContainer:private] => Array
        (
            [0] => Rtm\DataContainer Object
                (
                    [attributes:Rtm\DataContainer:private] => Array
                        (
                            [id] => 19594773
                            [taskseries] => Rtm\DataContainer Object
                                (
                                    [attributes:Rtm\DataContainer:private] => Array
                                        (
                                            [id] => 310899576
                                            [created] => 2013-10-03T05:35:52Z
                                            [modified] => 2013-11-06T17:24:36Z
                                            [name] => A new task
                                            [source] => js
                                            [url] => 
                                            [location_id] =>

                                        )
                                )
                        )
              )
      )
)

I want to get the value of [name]. How can I do it?

As far as I could understand from the docs, you have to call something like

$receivedObject->getTaskSeries()->getName()

Or there is a suggestion to apply toArray or toJson to returned object - that should work.