public static MutableGraph <R> Clone <T, R>(this BidirectionalGraph <T, Edge <T> > graph, Func <T, R> selector, Func <R, bool> condition)
where R : class
{
var newGraph = BidirectionalGraphExtensions.NewGraph <R>(graph.AllowParallelEdges);
var verticesMap = graph.CopyVertices <T, R>(newGraph, selector, condition);
graph.CopyEdges <T, R>(newGraph, verticesMap);
return(new MutableGraph <R>(newGraph));
}
