luaC_separateudata  543 lib/lua/lgc.c    udsize = luaC_separateudata(L, 0);  /* separate userdata to be finalized */
luaC_separateudata   99 lib/lua/lgc.h  LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all);
luaC_separateudata  203 lib/lua/lstate.c   luaC_separateudata(L, 1);  /* separate udata that have GC metamethods */