/**
  * Set the set of edges to be removed from the graph
  *
  * @param _rem_edge_hashcode_set
  */
 public void SetDelEdgeHashcodeSet(G.IList <Pair <int, int> > remEdgeCollection)
 {
     remEdgeSet.AddAll(remEdgeCollection);
 }
 /**
  * Set the set of vertices to be removed from the graph
  *
  * @param remVertexList
  */
 public void SetDelVertexIdList(G.IList <int> remVertexList)
 {
     this.remVertexIdSet.AddAll(remVertexList);
 }