where can I find a description of the pay_balance_view_pkg.get_balance_values for the parameters

I'm looking at the package code which you can find in oracle for a specific package. I've read that pay_balance_view_pkg.get_balance_values is preferred over pay_balance_view_pkg.get_balance_dimensions due to performance - which I'm having issues in the code we inherited from a consultant company.

When I'm reading the package I get the two versions: (bolded params are required)

function get_balance_values

    (p_payroll_rel_action_id     in number

    ,p_defined_balance_id_tab    in pay_number_tab_t

    ,p_payroll_term_id        in number    default null

    ,p_payroll_assignment_id     in number    default null