This snippet to rollback multiple payroll actions. Handy in a test environment.

for r in (
Select payroll_action_id from pay_payroll_actions
where
order by 1 desc
)
loop
py_rollback_pkg.rollback_payroll_action
(
p_payroll_action_id => r.payroll_action_id,
p_all_or_nothing => FALSE,
p_dml_mode => 'FULL'
);
end loop;