How to create a changeset for the files that appears in the unresolved folder programatically using RTC Java plain API.

Hello All,
I have a usecase wherein i need to delete particular files which is already part of Stream.

Now i have the RTC RepoWorkspace downloaded in my local through code.
I will have my logic to identify the file which has to be deleted.
when I delete that file in the local WS, that will reflect as a change in the Unresolved folder in the pending changes view.

Now through code, is there any way i can identify this deleted file as an object which is part of my Stream/Repo WS and create that changeset and deliver it ?

Are there any APIs to identify and convert the unresolved changes to changesets ? I have the logic for delivering the CSs.

Kindly assist on this. Thanks