In a multibranch project using Bitbucket Server Integration as the branch source, when I view the "Changes" page of a branch in Jenkins, each commit has a link "stash" that refers to the commit in Bitbucket Server. Because Atlassian renamed the Stash product to Bitbucket Server years ago, I'd expect the link text to be something like "Bitbucket Server" instead.
The hudson.plugins.git.browser.Stash usage was added to BitbucketSCMSource in PR #258 for
JENKINS-63071. The hudson.plugins.git.browser.BitbucketServer class was defined in git-plugin PR #1071 for JENKINS-39905 and released in Git Plugin 4.7.2.