/// <summary>
/// Initializes a new instance of the <see cref="ClusteredAdjacencyGraph{TVertex,TEdge}"/> class.
/// </summary>
/// <param name="parentGraph">Parent graph.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="parentGraph"/> is <see langword="null"/>.</exception>
public ClusteredAdjacencyGraph([NotNull] ClusteredAdjacencyGraph <TVertex, TEdge> parentGraph)
{
Parent = parentGraph ?? throw new ArgumentNullException(nameof(parentGraph));
Wrapped = new AdjacencyGraph <TVertex, TEdge>(parentGraph.AllowParallelEdges);
}
/// <summary>
/// Initializes a new instance of the <see cref="ClusteredAdjacencyGraph{TVertex,TEdge}"/> class.
/// </summary>
/// <param name="wrappedGraph">Graph to wrap.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="wrappedGraph"/> is <see langword="null"/>.</exception>
public ClusteredAdjacencyGraph([NotNull] AdjacencyGraph <TVertex, TEdge> wrappedGraph)
{
Parent = null;
Wrapped = wrappedGraph ?? throw new ArgumentNullException(nameof(wrappedGraph));
Collapsed = false;
}