Function gtk_sys::gtk_icon_info_load_symbolic_for_context_async

pub unsafe extern "C" fn gtk_icon_info_load_symbolic_for_context_async(
    icon_info: *mut GtkIconInfo, 
    context: *mut GtkStyleContext, 
    cancellable: *mut GCancellable, 
    callback: GAsyncReadyCallback, 
    user_data: gpointer
)