grman_clear(GraphicsManager *self, bool all, CellPixelSize cell) {
    filter_refs(self, NULL, true, all ? clear_all_filter_func : clear_filter_func, cell);
}
grman_clear(GraphicsManager *self, bool all, CellPixelSize cell) {
    filter_refs(self, NULL, true, all ? clear_all_filter_func : clear_filter_func, cell);
}