How to use the @nivo/geo.GeoMapDefaultProps.graticuleLineColor function in @nivo/geo

help: 'Control meridians and parallel lines width.',
        type: 'number',
        required: false,
        defaultValue: GeoMapDefaultProps.graticuleLineWidth,
        controlType: 'lineWidth',
        group: 'Graticule',
        controlOptions: {
            step: 0.5,
        },
    },
    {
        key: 'graticuleLineColor',
        help: 'Control meridians and parallel lines color.',
        type: 'string',
        required: false,
        defaultValue: GeoMapDefaultProps.graticuleLineColor,
        controlType: 'colorPicker',
        group: 'Graticule',
    },
    ...defsProperties('Style', ['svg']),
    {
        key: 'isInteractive',
        help: 'Enable/disable interactivity.',
        type: 'boolean',
        required: false,
        defaultValue: GeoMapDefaultProps.isInteractive,
        controlType: 'switch',
        group: 'Interactivity',
    },
    {
        key: 'onClick',
        help: 'onClick handler, it receives clicked node data and style plus mouse event.',

controlType: 'range',
        controlGroup: 'Graticule',
        controlOptions: {
            unit: 'px',
            min: 0,
            max: 10,
            step: 0.5,
        },
    },
    {
        key: 'graticuleLineColor',
        scopes: '*',
        description: 'Control meridians and parallel lines color.',
        type: '{string}',
        required: false,
        default: GeoMapDefaultProps.graticuleLineColor,
        controlType: 'colorPicker',
        controlGroup: 'Graticule',
    },
    ...defsProperties(['GeoMap']),
    ...marginProperties,
    {
        key: 'isInteractive',
        scopes: ['GeoMap', 'GeoMapCanvas', 'Choropleth', 'ChoroplethCanvas'],
        description: 'Enable/disable interactivity.',
        type: '{boolean}',
        required: false,
        default: GeoMapDefaultProps.isInteractive,
        controlType: 'switch',
        controlGroup: 'Interactivity',
    },
    {