luaK_setreturns    43 lib/lua/lcode.h #define luaK_setmultret(fs,e)	luaK_setreturns(fs, e, LUA_MULTRET)
luaK_setreturns    62 lib/lua/lcode.h LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
luaK_setreturns   262 lib/lua/lparser.c     luaK_setreturns(fs, e, extra);  /* last exp. provides the difference */