How to use the osxphotos.utils.get_system_library_path function in osxphotos

def test_get_system_library_path():
    import osxphotos

    _, major, _ = osxphotos.utils._get_os_version()
    if int(major) < 15:
        assert osxphotos.utils.get_system_library_path() is None
    else:
        assert osxphotos.utils.get_system_library_path() is not None

- system library
        - ~/Pictures/Photos Library.photoslibrary
        - failing above, returns None
    """
    if db_options:
        for db in db_options:
            if db is not None:
                return db

    # if get here, no valid database paths passed, so try to figure out which to use
    db = osxphotos.utils.get_last_library_path()
    if db is not None:
        click.echo(f"Using last opened Photos library: {db}", err=True)
        return db

    db = osxphotos.utils.get_system_library_path()
    if db is not None:
        click.echo(f"Using system Photos library: {db}", err=True)
        return db

    db = os.path.expanduser("~/Pictures/Photos Library.photoslibrary")
    if os.path.isdir(db):
        click.echo(f"Using Photos library: {db}", err=True)
        return db
    else:
        return None

def _list_libraries(json_=False, error=True):
    """ Print list of Photos libraries found on the system. 
        If json_ == True, print output as JSON (default = False) """

    photo_libs = osxphotos.utils.list_photo_libraries()
    sys_lib = osxphotos.utils.get_system_library_path()
    last_lib = osxphotos.utils.get_last_library_path()

    if json_:
        libs = {
            "photo_libraries": photo_libs,
            "system_library": sys_lib,
            "last_library": last_lib,
        }
        click.echo(json.dumps(libs))
    else:
        last_lib_flag = sys_lib_flag = False

        for lib in photo_libs:
            if lib == sys_lib:
                click.echo(f"(*)\t{lib}", err=error)
                sys_lib_flag = True

def main():
    db = osxphotos.utils.get_system_library_path()
    if db is None:
        # Note: get_system_library_path only works on MacOS 10.15+
        db = os.path.expanduser("~/Pictures/Photos Library.photoslibrary")

    photosdb = osxphotos.PhotosDB(db)
    print(f"db file = {photosdb.db_path}")
    print(f"db version = {photosdb.db_version}")

    print(photosdb.keywords)
    print(photosdb.persons)
    print(photosdb.albums)

    print(photosdb.keywords_as_dict)
    print(photosdb.persons_as_dict)
    print(photosdb.albums_as_dict)