+ add("group", static_cast<void (Loader::*)(int)>(&Loader::group));
+ add("group", static_cast<void (Loader::*)(int, int)>(&Loader::group));
+ add("group", static_cast<void (Loader::*)(int, int, int)>(&Loader::group));
+ add("group", static_cast<void (Loader::*)(int, int, int, int)>(&Loader::group));
+ add("weight", static_cast<void (Loader::*)(float)>(&Loader::weight));
+ add("weight", static_cast<void (Loader::*)(float, float)>(&Loader::weight));
+ add("weight", static_cast<void (Loader::*)(float, float, float)>(&Loader::weight));
+ add("weight", static_cast<void (Loader::*)(float, float, float, float)>(&Loader::weight));