pub unsafe extern "C" fn gtk_icon_info_load_symbolic_async( icon_info: *mut GtkIconInfo, fg: *const GdkRGBA, success_color: *const GdkRGBA, warning_color: *const GdkRGBA, error_color: *const GdkRGBA, cancellable: *mut GCancellable, callback: GAsyncReadyCallback, user_data: gpointer)