[Freeswitch-users] how to set the recording behavior in session:recordFile()?

is it possible to set the recording behavior(record a-leg, b-leg, or both) in session:recordFile(), like we do in the dialplan: <action application="bind_meta_app" data="2 b s record_session::$${recordings_dir}/${caller_id_number}.${strftime(%Y-%m-%d-%H-%M -%S)}.wav"/> in my point of view, session is a handle of one call leg, so by session:recordFile along it may not work out, any clue? BR