How to convert g_object_set uri to C++

[Фамилия Имя]

btw, refPlay is a playbin var created this way:
Glib::RefPtr<Gst::Element> refPlay = Gst::ElementFactory::create_element("playbin", "play");

04.09.2012, 09:19, "Фамилия Имя" <kangaba at yandex.ru>:
> I'm using the (standard) C++ bindings available on Ubuntu (12.04) by installing libgstreamermm-0.10-dev
>
> 04.09.2012, 09:11, "Cedric Hombourger" <chombourger at gmail.com>:
>
>>   Hi,
>>
>>   Are you using the C API or some sort of C++ bindings to GStreamer?
>>
>>   Cedric
>>
>>   On Sep 4, 2012, at 7:47 AM, Фамилия Имя <kangaba at yandex.ru> wrote:
>>>    Hi,
>>>    Sorry if it's the wrong place,
>>>    What would be the C++ version of setting the "uri" of the Gst::Element:
>>>    g_object_set(G_OBJECT(refElement->gobj()), "uri", "file:///path/to/file.mp3", NULL);
>>>
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