Documentation on how to save state of an external inside Live using the Parameter system

[sjeast]

I would like to add the ability to save the state of my external inside a Live Set.

So this presumably means implementing a set of attributes and possibly other things to enable the Live Parameter system - so attributes like parameter_enable, parameter_type etc.

Maybe I am missing something but I can't find any documentation on what is required to do this.

There is a small reference to saving data in the min.textslider example by adding a magic "value" attribute - but that might just be for pattr support I guess.

The where to look docs talk about the min.function possibly also being useful but this is not included in the SDK.