I am using the SwaptionHelper class to create the swaptions.
Reading the documentation: https://www.quantlib.org/reference/class_quant_lib_1_1_swaption_helper.html
I realize that one of the parameters required to provide is called BlackCalibrationHelper. However, I am using Normal volatility for the calibration.
I think it is also not possible to just omit the parameter.
Could anyone advise the parameter to provide in this case? The example online used CalibrationHelper which is deprecated in v1.16.