How to use the @nivo/stream.StreamDefaultProps.dotBorderWidth function in @nivo/stream

key: 'dotColor',
        help: 'Method to compute dots color.',
        type: 'string | object | Function',
        required: false,
        defaultValue: defaults.dotColor,
        controlType: 'inheritedColor',
        group: 'Dots',
    },
    {
        key: 'dotBorderWidth',
        help: 'Width of the dots border.',
        description:
            'Width of the dots border, it also accepts a function which can be used to make it vary according to the associated datum.',
        type: 'number | Function',
        required: false,
        defaultValue: defaults.dotBorderWidth,
        controlType: 'lineWidth',
        group: 'Dots',
    },
    {
        key: 'dotBorderColor',
        help: 'Method to compute dots border color.',
        type: 'string | object | Function',
        required: false,
        defaultValue: defaults.dotBorderColor,
        controlType: 'inheritedColor',
        group: 'Dots',
    },
    {
        key: 'isInteractive',
        flavors: ['svg'],
        help: 'Enable/disable interactivity.',