public bool IsEdge(TVertex source, TVertex dest) => OutgoingEdges.TryGetValue(source, out var childrenMap) && childrenMap.Any() && childrenMap.TryGetValue(dest, out var edges) && edges.Any();
public bool ContainsVertex(TVertex vertex) => OutgoingEdges.ContainsKey(vertex);
public IEnumerable <TVertex> GetChildren(TVertex vertex)
=> OutgoingEdges.TryGetValue(vertex, out var childMap)
? childMap.Keys
: Enumerable.Empty <TVertex>();
public void Clear()
{
IncomingEdges.Clear();
OutgoingEdges.Clear();
}
internal void Remove(long id)
{
IncomingEdges = IncomingEdges.Where(e => e.Id == id).ToList();
OutgoingEdges = OutgoingEdges.Where(e => e.Id == id).ToList();
}
