def METHOD_NAME():
    """
    Collects repoids of all enabled repositories on the source system.
    :returns: Set of all enabled repository IDs present on the source system.
    :rtype: Set[str]
    """
    enabled_repoids = set()
    for repos in api.consume(RepositoriesFacts):
        for repo_file in repos.repositories:
            for repo in repo_file.data:
                if repo.enabled:
                    enabled_repoids.add(repo.repoid)
    return enabled_repoids