source:

Based on this demo, I think I need to clarify some things about changes from multiple authors:

The system is prepared to merge all changes in a way that any data should not be lost regardless of how the changes are "ordered".
When I'm editing and new edits comes in from other people, two things can happen:
1. My edits are not related to other people's edits: In this case, we should be able to update the document without getting in the current user's way. This means that we will just update the new parts and that's it.
2. My edits are made on the same things other people's edits
  Here's where we need to show a warning because the correct thing to do will be to:
  1. remove the user's changes
  2. apply the new version made for other people in teh network
  3. apply the users changes back
  I believe in this case we should show the banner to the user saying that there are some changes made that needs to be merged or included.