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

{
        key: 'renderDot',
        group: 'Dots',
        flavors: ['svg'],
        help: 'Custom rendering function for dots.',
        type: 'Function',
        required: false,
    },
    {
        key: 'dotSize',
        help: 'Size of the dots',
        description:
            'Size of the dots, 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.dotSize,
        controlType: 'range',
        group: 'Dots',
        controlOptions: {
            unit: 'px',
            min: 2,
            max: 20,
        },
    },
    {
        key: 'dotColor',
        help: 'Method to compute dots color.',
        type: 'string | object | Function',
        required: false,
        defaultValue: defaults.dotColor,
        controlType: 'inheritedColor',
        group: 'Dots',