This function gets back user data pointers stored via gst_mini_object_set_qdata() and removes the data from @object without invoking its destroy() function (if any was set).
A #GQuark, naming the user data pointer
The user data pointer set, or %NULL
See Implementation
This function gets back user data pointers stored via gst_mini_object_set_qdata() and removes the data from @object without invoking its destroy() function (if any was set).