Hello everyone!

My questions are this:

1- Where can I get a list of the methods that can be called from the variables             worked_days, employee, contract, inputs, payslip and category? I mean methods     like payslip.sum_list(). I need a list of it.

2- How can I add a new variable like the ones I've mentioned before? I want to            create a new module for a new kind of payment and I would need the pisibility        to call it's methods in the salary rules like I do with payslip, contract, etc.

Thanks in advance.