### Question:
Graph6Sparse6Importer extends AbstractBaseImporter<V,E> implements GraphImporter<V,E> { @Override public void importGraph(Graph<V, E> g, Reader input) throws ImportException { BufferedReader in; if (input instanceof BufferedReader) { in = (BufferedReader) input; } else { in = new BufferedReader(input); } String g6=""; try { g6=in.readLine(); } catch (IOException e) { e.printStackTrace(); } if(g6.isEmpty()) throw new ImportException("Failed to read graph"); this.importGraph(g, g6); } Graph6Sparse6Importer(
            VertexProvider<V> vertexProvider, EdgeProvider<V, E> edgeProvider, double defaultWeight);  Graph6Sparse6Importer(VertexProvider<V> vertexProvider, EdgeProvider<V, E> edgeProvider); @Override void importGraph(Graph<V, E> g, Reader input); void importGraph(Graph<V, E> g, String g6);  }### Answer:
@Test public void testFromFile() throws ImportException, IOException { InputStream fstream = getClass().getClassLoader().getResourceAsStream("ellinghamHorton78Graph.s6"); Graph<Integer, DefaultEdge> g= new Pseudograph<>(DefaultEdge.class); Graph6Sparse6Importer<Integer, DefaultEdge> importer = new Graph6Sparse6Importer<>( (l, a) -> Integer.parseInt(l), (f, t, l, a) -> g.getEdgeFactory().createEdge(f, t)); importer.importGraph(g, fstream); this.compare(NamedGraphGenerator.ellinghamHorton78Graph(), g); }