### Question:
GraphUtil { public static Vertex cloneVertexIntoGraph( Vertex vertex, Graph g ) { Vertex clone = g.getVertex( vertex.getId() ); if ( clone != null ) { return clone; } clone = g.addVertex( vertex.getId() ); Set<String> keys = vertex.getPropertyKeys(); for ( String key : keys ) { Object value = vertex.getProperty( key ); clone.setProperty( key, value ); } return clone; } protected  GraphUtil(); static Vertex cloneVertexIntoGraph( Vertex vertex, Graph g );  }### Answer:
@Test public void testCloneVertexIntoGraph() throws Exception { }