I’m trying to learn how to use the different types of building blocks used for constraint streams in Timefold. To do this, I’m using the Employee Scheduling example as a base and modifying it. I want to add a constraint that limits the number of consecutive days an employee can work, i.e. be assigned to a shift, considering that a shift belongs to the day in which its start time is located. The limit of consecutive working days is set to 4.

I wrote this code for the constraint, following the example of consecutive matches in section 4.5.7 of the Score Calculation section of the timefold documentation

    Constraint maxConseutiveDays(ConstraintFactory constraintFactory) {
        return constraintFactory.forEach(Shift.class)
                .filter(shift -> shift.getEmployee() != null)
                .groupBy(Shift::getEmployee, 
                        ConstraintCollectors.toConsecutiveSequences(Shift::getStart, Shift::getId))
                .flattenLast(SequenceChain::getConsecutiveSequences)
                .filter((employee, shifts) -> shifts.getCount() > 4)
                .penalize(HardSoftScore.ONE_HARD)
                .asConstraint("Maximum consecutive working days exceeded");
    }

However, I keep getting build errors, particularly one that says no suitable method found for toConsecutiveSequences(Shift::getStart,Shift::getId). Could someone give me more details about the arguments expected by the toConsecutiveSequences function or something that will help me find the error?