Freeway 3.5 Pro introduced a new user function fwParametersCreated this is called whenever parameters are created for an instance of an Action.
The fwParametersCreated user function as been added so that you can be guaranteed of initialising parameters that your Action depends on for every instance. Previously Action writers have had to rely on doing this sort of initialisation in the fwInterface function or when an Action is published. Download this Tech Note for more.