GST_QUERY_CAST    629 gst/gstinfo.c      GstQuery *query = GST_QUERY_CAST (object);
GST_QUERY_CAST    204 gst/gstquery.h   return GST_QUERY_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST (q)));
GST_QUERY_CAST    240 gst/gstquery.h   return GST_QUERY_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CAST (q)));
GST_QUERY_CAST    249 gst/gstquery.h #define         gst_query_make_writable(q)      GST_QUERY_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (q)))