How to use the cibuildwheel.util.DependencyConstraints.with_defaults function in cibuildwheel

before_test = get_option_from_environment('CIBW_BEFORE_TEST', platform=platform)
    test_requires = get_option_from_environment('CIBW_TEST_REQUIRES', platform=platform, default='').split()
    test_extras = get_option_from_environment('CIBW_TEST_EXTRAS', platform=platform, default='')
    build_verbosity_str = get_option_from_environment('CIBW_BUILD_VERBOSITY', platform=platform, default='')

    build_selector = BuildSelector(build_config, skip_config)

    try:
        environment = parse_environment(environment_config)
    except (EnvironmentParseError, ValueError):
        print(f'cibuildwheel: Malformed environment option "{environment_config}"', file=sys.stderr)
        traceback.print_exc(None, sys.stderr)
        exit(2)

    if dependency_versions == 'pinned':
        dependency_constraints: Optional[DependencyConstraints] = DependencyConstraints.with_defaults()
    elif dependency_versions == 'latest':
        dependency_constraints = None
    else:
        dependency_versions_path = Path(dependency_versions)
        dependency_constraints = DependencyConstraints(dependency_versions_path)

    if test_extras:
        test_extras = f'[{test_extras}]'

    try:
        build_verbosity = min(3, max(-3, int(build_verbosity_str)))
    except ValueError:
        build_verbosity = 0

    # Add CIBUILDWHEEL environment variable
    # This needs to be passed on to the docker container in linux.py