Extra links supported for operators coming from third-party packages:

airflow.serialization.serialized_objects.BUILTIN_OPERATOR_EXTRA_LINKS

airflow/cli/cli_parser.py
help='Export all users',
        func=lazy_load_command('airflow.cli.commands.user_command.users_export'),
        args=(ARG_USER_EXPORT,),
    ),
)
ROLES_COMMANDS = (
    ActionCommand(
        name='list',
        help='List roles',
        func=lazy_load_command('airflow.cli.commands.role_command.roles_list'),
        args=(ARG_OUTPUT,),
    ),
    ActionCommand(
        name='create',
        help='Create role',
        func=lazy_load_command('airflow.cli.commands.role_command.roles_create'),
        args=(ARG_ROLES,),
    ),
)
CELERY_COMMANDS = (
    ActionCommand(
        name='worker',
        help="Start a Celery worker node",
        func=lazy_load_command('airflow.cli.commands.celery_command.worker'),
        args=(
            ARG_QUEUES,
            ARG_CONCURRENCY,
            ARG_CELERY_HOSTNAME,
            ARG_PID,
            ARG_DAEMON,