-void a_acquire ( VikWindow *vw, VikLayersPanel *vlp, VikViewport *vvp, VikDataSourceInterface *source_interface );
+void a_acquire ( VikWindow *vw,
+ VikLayersPanel *vlp,
+ VikViewport *vvp,
+ vik_datasource_mode_t mode,
+ VikDataSourceInterface *source_interface,
+ gpointer userdata,
+ VikDataSourceCleanupFunc cleanup_function );