public static void AddVolatileDataTree <T1, T2>(this IGH_Param param, IGH_Structure structure, Converter <T1, T2> converter)
where T1 : IGH_Goo
where T2 : IGH_Goo
{
for (int p = 0; p < structure.PathCount; ++p)
{
var path = structure.get_Path(p);
var srcBranch = structure.get_Branch(path);
var data = srcBranch.As <T1>().Select(x => x == null ? default : converter(x));
param.AddVolatileDataList(path, data);
}
}