END_FLOW_CONTROL for particular stream interpretation

What happens to session level flow control when a WINDOW_UPDATE frame with END_FLOW_CONTROL flag set is received with a particular stream id (stream_id other than "0")?
E.g.
Session Window Size: 64kb
Stream Window Size: 64kb, stream_id: 2
Receive WINDOW_UPDATE with END_FLOW_CONTROL bit set, stream_id:2
Should the sender follow the session level flow control or ignore flow control for stream_id:2?
- Saurabh