private void SwapSubChannelRows(int index1, int index2)
{
Channel temp = subchannels_[index1];
subchannels_[index1] = subchannels_[index2];
subchannels_[index2] = temp;
SubChannelsGrid.InvalidateRow(index1);
SubChannelsGrid.InvalidateRow(index2);
ChannelEditing.SetSubChannels(merged_channel_, subchannels_, true);
}