How to set a shared-library globally using the JCASC plugin?

Question

This Q&A is related to this one and is slightly different.

Answer 1

https://github.com/jenkinsci/configuration-as-code-plugin/blob/master/demos/jenkins/jenkins.yaml

It should be possible by configuring it like this:

unclassified:
  globalLibraries:
    libraries:
      - name: "some-lib"
        retriever:
          modernSCM:
            scm:
              git:
                remote: "https://github.com/some-project.git"
                credentialsId: 'some-credentials'