/// <summary>
/// Returns the nodes that are neighbors of the given node, that is, nodes that are directly connected to the
/// given node via an edge.
/// </summary>
/// <param name="node">The node to find neighbors of.</param>
/// <returns>An <see cref="IEnumerable{T}"/> of the neighboring nodes.</returns>
public IEnumerable <ModelNode> GetNeighbors(ModelNode node)
{
return(edges.Where(e => e.Source == node).Select(e => e.Target)
.Union(edges.Where(e => e.Target == node).Select(e => e.Source)));
}
/// <summary>
/// Returns the edges having the given node as either source or target.
/// </summary>
/// <param name="node">The node to find connected edges of.</param>
/// <returns>An <see cref="IEnumerable{T}"/> of the edges that are connected to the node.</returns>
public IEnumerable <ModelEdge> GetAdjacentEdges(ModelNode node)
{
return(edges.Where(e => e.Source == node || e.Target == node));
}
