The documentation for Stash's branch-utils REST documentation (https://developer.atlassian.com/static/rest/stash/3.10.0/stash-branch-utils-rest.html) has an typo in the DELETE example for the "/rest/branch-utils/1.0/projects/{projectKey}/repos/{repositorySlug}/branches" endpoint.

In the example, the DELETE request payload JSON has name set to "/refs/heads/my-branch", but it should be "refs/heads/my-branch" (no leading /).

Since the API doesn't return any information when a branch doesn't exist, this took a while for me to figure out what was wrong.  Please update the documentation to avoid others the headache.