second_order_w value to the current slot listInternal helper that validates a second_order_w value (a single logical,
a single flux scheme name, or a named vector with entries flux and/or
bin_average) and returns the updated named list. Shared by the
second_order_w<- setter and by the model constructors (e.g.
newMultispeciesParams()), which set the slot directly before the rest of
the parameters are computed so that the bin-averaged constructions pick up
the flag, without the setter's extra setParams() call.
validate_second_order_w(current, value)The updated second_order_w list.
The current second_order_w slot list (with entries flux
and bin_average).
The value to apply, as described above.