addParameters()
Tells the host application what parameters your plug-in requires.
Declaration
func addParameters() throwsMentioned in
Discussion
Use the apiManager object that was passed to your init(apiManager:) method to obtain an FxParameterCreation* object. Tell the parameter creation API object which types of parameters your plug-in needs. This method is only called at most once per instance of your plug-in. It will not be called when loading a document which contains your plug-in.