private void InvokeLDNetworksChangedEvent(IUndoableCommand command)
{
if (command is LadderDiagramReplaceNetworksCommand ||
command is LadderDiagramRemoveNetworksCommand ||
command is LadderDiagramExchangeNetworkCommand ||
command is LadderDiagramMoveNetworkCommand)
{
ldvmodel.InvokeLDNetworksChanged();
}
}