def METHOD_NAME(config: Config, system: System) -> ActionReturn:
    try:
        system.run(f"git merge --no-ff {config.staging_branch} -m 'Merge deployment staging branch {config.staging_branch}'")
        return PASSED(f"Merged staging branch {config.staging_branch!r} into base branch {config.base_branch!r}")
    except RuntimeError as e:
        return FAILED(f"Could NOT merge staging branch {config.staging_branch!r} in to base branch {config.base_branch!r}", details=e.args)