A function used to filter which parameters should be added to the bag, when filling it with e_cal_component_parameter_bag_new_from_property() and e_cal_component_parameter_bag_set_from_property().
an #ICalParameter
A function used to filter which parameters should be added to the bag, when filling it with e_cal_component_parameter_bag_new_from_property() and e_cal_component_parameter_bag_set_from_property().