Hello

We would like to use the mongodb rust driver.
We have a relatively contrived use-case where we would like to use the mongodb rust driver, but would need to do watch operations on collections (even in a beta capacity tbh).

We can see that the "change-streams" branch exists ( https://github.com/mongodb/mongo-rust-driver/tree/change-streams ), and we are also seeing that related tickets ( https://jira.mongodb.org/browse/RUST-519 , https://jira.mongodb.org/browse/RUST-520 ) are marked on Jira as closed ,  under version 1.1.0 and 1.2.0 . However it appears to us that the associated branch was never merged to master ( last updated 11 months ago ) and has not been released in any of the official versions.

Both those tickets refer to a change streams related epic, https://jira.mongodb.org/browse/RUST-142 , but it has either been deleted or is not publicly available.

Unless we haven't found the correct place to look at, we are not finding a lot of visibility on this topic. We would therefore like to know : 

• is there another Jira epic/issue we can look at to have visibility on when/where the change-streams/watch feature may be available 
• is the change-streams branch "abandoned" ;  as-in, is it planned to be merged back in and released at some point ; should we fork the project and attempt to use that branch  as a dependency directly ; is it known to be bug-ridden ?
• is there any other information available regarding change-stream/watch availability for the rust driver ?