FxParameterFlags
These constants specify the characteristics of parameters display.
Declaration
typealias FxParameterFlags = UInt32Discussion
Not all of the flags are meaningfully to all of the parameter types. The only flags, for example, that apply to group parameters are kFxParameterFlag_COLLAPSED, kFxParameterFlag_DONT_DISPLAY_IN_DASHBOARD, kFxParameterFlag_HIDDEN, and kFxParameterFlag_DISABLED.
You are unable to give a group parameter a custom user interface.