/// <summary>
/// Builds the neighbours set.
/// </summary>
/// <param name="neighbours"></param>
/// <returns></returns>
private HashSet<uint> BuildNeighboursSet(KeyValuePair<uint, CHEdgeData>[] neighbours)
{
neighbours = neighbours.RemoveInformativeEdges();
var neighboursSet = new HashSet<uint>();
foreach (KeyValuePair<uint, CHEdgeData> neighbour in neighbours)
{
neighboursSet.Add(neighbour.Key);
}
return neighboursSet;
}