Example 1:
        local indtypes = GSIndustryTypeList();
        for (local it = indtypes.Begin(); !indtypes.IsEnd(); it = indtypes.Next())
        {
                if (GSIndustryType.IsRawIndustry(it))
                {
                     ...
                }
        }


Example 2:

                neighbors = GSTownList()
                foreach(t in neighbors) {
                        Log.Info("  " + GSTown.GetName(t.id) + "  " + t.dist);
                }