Is splitTests still a valid command?

### Describe your use-case which is not covered by existing documentation.

Hey folks - this document https://www.jenkins.io/doc/pipeline/steps/parallel-test-executor/ points at a `splitTests` example that returns a 404 page: https://github.com/jenkinsci/parallel-test-executor-plugin/blob/master/demo/repo/Jenkinsfile

Is that option still supported?

Thanks!

### Reference any relevant documentation, other materials or issues/pull requests that can be used for inspiration.

_No response_

### Are you interested in contributing to the documentation?

Yes indeed