public ISubGraph AddSubGraph(ISubGraph subgraph)
{
if (subgraph == null)
{
throw new ArgumentNullException(nameof(subgraph));
}
if (!Equals(subgraph.Parent) && !SubGraphs.ContainsKey(subgraph.Parent))
{
throw new ArgumentException(
FormattableString.Invariant($"Parent of SubGraph {subgraph.Id} not within Graph!"));
}
if (!SubGraphs.ContainsKey(subgraph))
{
SubGraphs[subgraph] = subgraph;
}
var addedSubGraph = SubGraphs[subgraph];
addedSubGraph.SetAttributes(subgraph.GetAttributes());
return(addedSubGraph);
}