Hi, I have a kids training attendance list which pick up data from the dat

Hi,

I have a kids training attendance list which pick up data from the database if the child was present or not.
The data is formed from two entities (Member.class and Training.class)
that work very well. Now I see your excellent tool and I want to use it but I do not know which parameter should entered in the setKey() method in this case?

List<Training> trainings = trainingRepository.findAll);
for (Training training : trainings) {
	grid.addColumn(member -> training
			.getMember()
			.contains(member) ? "X" : "")
			.setHeader(training.getTrainingdate().format(formatter))
			.setKey();

The current version doesn’t really support this. It has actually become a frequently asked feature, I will make a new version soon.