/// <summary>
/// get row index which holds marker
/// </summary>
/// <param name="board_id"></param>
/// <returns>row num in 2d array</returns>
/// <exception cref="BrainFlowException">If this board has no such data exit code is UNSUPPORTED_BOARD_ERROR</exception>
public static int get_marker_channel(int board_id)
{
int[] val = new int[1];
int res = BoardControllerLibrary.get_marker_channel(board_id, val);
if (res != (int)CustomExitCodes.STATUS_OK)
{
throw new BrainFlowException(res);
}
return(val[0]);
}