How to get the root directory (src files) of specific branch?

[meetakbari25]

I have 3 branches in my repository : main, branch1 and branch2

In Bitbucket Cloud REST API Documentation, there is an API to get the root directory of main branch: https://developer.atlassian.com/cloud/bitbucket/rest/api-group-source/#api-repositories-workspace-repo-slug-src-get

But I want to get root directory (basically all the src files under branch branch1) of branch1 not main branch. So, are there any way to achieve this by passing any query parameter on this endpoint: `GET /2.0/repositories/{workspace}/{repo_slug}/src`

I tried the solution suggested here in this question asked by someone, but even that's not working: Fetch-list-of-files-with-details-present-under-branch-or-tag/qaq-p/1148751 

If Bitbucket Developer team can confirm whether this feature (passing ?branch=<branch_name> query param to get specific branch src files) will be supported in next Bitbucket Cloud 2.0 REST API release or not, then It would be really helpful. Till then if someone know the work around or the specific solution, please comment. 

Thanks.