missing_defaults_at_project.yaml:4:3: In project 'sample-project'
    - project:
      ^
missing_defaults_at_project.yaml:1:3: In job template 'sample-job'
    - job-template:
      ^
missing_defaults_at_project.yaml:6:15: Job template 'sample-job' wants defaults 'global' but it was never defined
        defaults: missing-defaults
                  ^