[Freeswitch-users] cleanup of lua hangup hook after call disconnection

Hi, http://wiki.freeswitch.org/wiki/Mod_lua#Special_Case:_env_object says this hangup hook is called at the end of channel disconnection. While the channel is disconnected and the lua script is already exited, and since there are no sessions at this point, (because we respond and hangup in the dialplan sent by lua) the channel cleanup would be done by the lua garbage collector? Or maybe I am understanding it wrong? The dialplan is served by a lua script. Thanks