* commit 'af9272349fb9eed1653d5af0768c9517e36070a6': Rename offer() to add(), remove/hide some APIs. Sort order is sticky for session, back leaves.
* commit 'af9272349fb9eed1653d5af0768c9517e36070a6': Rename offer() to add(), remove/hide some APIs. Sort order is sticky for session, back leaves.