code: @Deprecated
  	public static CalibrationDetectorChessboard chessboard(@Nullable ConfigChessboard configDet ,
  														   ConfigGridDimen configGrid ) {
  		if( configDet == null )
  			configDet = new ConfigChessboard();
  		configDet.checkValidity();
  
  		return new CalibrationDetectorChessboard(configDet,configGrid);
  	}
docs: Detector for chessboard targets.  Squares can be partially outside, but inside corners must be entirely
  inside the image.
  
  @see DetectChessboardFiducial
  
  @param configDet Configuration for chessboard detector
  @return Square grid target detector.