482   int ref;  in luaL_ref()  local
489   ref = (int)lua_tointeger(L, -1);  /* ref = t[FREELIST_REF] */  in luaL_ref()
491   if (ref != 0) {  /* any free element? */  in luaL_ref()
492     lua_rawgeti(L, t, ref);  /* remove it from list */  in luaL_ref()
496     ref = (int)lua_objlen(L, t);  in luaL_ref()
497     ref++;  /* create new reference */  in luaL_ref()
499   lua_rawseti(L, t, ref);  in luaL_ref()
500   return ref;  in luaL_ref()
504 LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {  in luaL_unref()  argument
505   if (ref >= 0) {  in luaL_unref()
508     lua_rawseti(L, t, ref);  /* t[ref] = t[FREELIST_REF] */  in luaL_unref()
509     lua_pushinteger(L, ref);  in luaL_unref()