How to use the gcovr.configuration.OutputOrDefault function in gcovr

def print_reports(covdata, options, logger):
    reports_were_written = False
    default_output = OutputOrDefault(options.output)

    generators = []

    generators.append((
        lambda: options.xml or options.prettyxml,
        [options.xml],
        print_xml_report,
        lambda: logger.warn(
            "Cobertura output skipped - "
            "consider providing an output file with `--xml=OUTPUT`.")))

    generators.append((
        lambda: options.html or options.html_details,
        [options.html, options.html_details],
        print_html_report,
        lambda: logger.warn(

GcovrConfigOption(
        "prettyxml", ["--xml-pretty"],
        group="output_options",
        help="Pretty-print the XML report. Implies --xml. Default: {default!s}.",
        action="store_true",
    ),
    GcovrConfigOption(
        "html", ["--html"],
        group="output_options",
        metavar='OUTPUT',
        help="Generate a HTML report. "
             "OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "html_details", ["--html-details"],
        group="output_options",
        metavar="OUTPUT",
        help="Add annotated source code reports to the HTML report. "
             "Implies --html. "
             "OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "html_title", ["--html-title"],
        group="output_options",

help="Generate a HTML report. "
             "OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "html_details", ["--html-details"],
        group="output_options",
        metavar="OUTPUT",
        help="Add annotated source code reports to the HTML report. "
             "Implies --html. "
             "OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "html_title", ["--html-title"],
        group="output_options",
        metavar="TITLE",
        help="Use TITLE as title for the HTML report. Default is {default!s}.",
        default="Head",
    ),
    GcovrConfigOption(
        "html_medium_threshold", ["--html-medium-threshold"],
        group="output_options",
        type=check_percentage,
        metavar="MEDIUM",
        help="If the coverage is below MEDIUM, the value is marked "

"OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "json", ["--json"],
        group="output_options",
        metavar='OUTPUT',
        help="Generate a JSON report. "
             "OUTPUT is optional and defaults to --output.",
        nargs='?',
        type=OutputOrDefault,
        default=None,
        const=OutputOrDefault(None),
    ),
    GcovrConfigOption(
        "prettyjson", ["--json-pretty"],
        group="output_options",
        help="Pretty-print the JSON report. Implies --json. Default: {default!s}.",
        action="store_true",
    ),
    GcovrConfigOption(
        "filter", ["-f", "--filter"],
        group="filter_options",
        help="Keep only source files that match this filter. "
             "Can be specified multiple times. "
             "If no filters are provided, defaults to --root.",
        action="append",
        type=FilterOption,
        default=[],