void WriteSimpleComponent(const GraphComponent<Graph>& gc,
		const string& file_name, shared_ptr<GraphColorer<Graph>> colorer,
		const GraphLabeler<Graph> &labeler) {
    EmptyGraphLinker<Graph> linker;
    ofstream os;
    os.open(file_name);
	omnigraph::visualization::ComponentVisualizer<Graph>(gc.g(), false).Visualize(gc, os, labeler, *colorer, linker);
	os.close();
}
void WriteComponent(const GraphComponent<Graph>& gc,
		const string& file_name, shared_ptr<GraphColorer<Graph>> colorer,
		const GraphLabeler<Graph> &labeler) {
    EmptyGraphLinker<Graph> linker;
    BorderDecorator<Graph> component_colorer(gc, *colorer, "yellow");
    ofstream os;
    os.open(file_name);
	omnigraph::visualization::ComponentVisualizer<Graph>(gc.g(), true).Visualize(gc, os, labeler, component_colorer, linker);
	os.close();
}