public void removeEdge(int mainNodeId, int additionId, GraphEdgeType edgeType) {
    if (edgeType.isNormalEdge()) {
      myEdges.remove(mainNodeId, compressEdge(additionId, edgeType));
      myEdges.remove(additionId, compressEdge(mainNodeId, edgeType));
    }
    else {
      myEdges.remove(mainNodeId, compressEdge(additionId, edgeType));
    }
  }
public void removeEdge(int mainNodeId, int additionId, GraphEdgeType edgeType)