#define IG_UNIQUE_ID(this) ((void*)&((this)->_GroupSizeRef)) // NB nico : use some pointer *inside* CInterfaceGroup as a unique id for lua registry (any field but
#define IG_UNIQUE_ID(this) ((void*)&((this)->_GroupSizeRef)) // NB nico : use some pointer *inside* CInterfaceGroup as a unique id for lua registry (any field but
// the first), instead of using 'this'. 'this' is already used by
// the first), instead of using 'this'. 'this' is already used by
// CLuaIHM::pushReflectableOnStack as unique id to CInterfaceElement's ref pointers
// CLuaIHM::pushReflectableOnStack as unique id to CInterfaceElement's ref pointers