/// <summary>
/// Loads nodes that are depots
/// </summary>
/// <param name="nodes">all nodes in graph</param>
/// <returns>Nodes that are depots</returns>
protected List <INode> LoadDepots(IEnumerable <INode> nodes)
{
NodesCollection graphNodes = new NodesCollection(nodes);
NodesCollection result = new NodesCollection();
foreach (int id in tspFile.Depots)
{
result.Add(graphNodes.FindById(id));
}
return(result.ToList());
}