What is the best way to update the data source.

Hi,

I'm having the following user case:
The application last state before going to background is "chat mode" (other state: inbox, with channels listed), messages loaded into the data source, everything is great.

Now, when user gets a notification and then opens the app, as stated, the app is already in chat state. I need to update the chat with the newer, relevant data.

I tried to change the datasource with new information and then call
`chatDataSourceDidUpdate(aSelf.dataSource, updateType: UpdateType.normal)`
but the data is updating with weird animation.

What is the best way for updating the datasource without having that animation?

Start at chatDataSourceDidUpdate(aSelf.dataSource, updateType: UpdateType.normal) and trace how UpdateType.normal handles a changed data source. Reproduce the background-to-chat notification flow with newer messages, then determine what behavior counts as done: the chat data updates without the reported weird animation.

Written by the indexing model from the issue text.