How to use the @nivo/bullet.BulletDefaultProps.markerSize function in @nivo/bullet

required: false,
        defaultValue: defaults.measureSize,
        controlType: 'range',
        group: 'Base',
        controlOptions: {
            min: 0,
            max: 1,
            step: 0.05,
        },
    },
    {
        key: 'markerSize',
        help: 'define size of markers related to item size, expressed as a ratio.',
        type: 'number',
        required: false,
        defaultValue: defaults.markerSize,
        controlType: 'range',
        group: 'Base',
        controlOptions: {
            min: 0,
            max: 2,
            step: 0.05,
        },
    },
    {
        key: 'rangeComponent',
        flavors: ['svg'],
        group: 'Style',
        help: 'Custom component for ranges.',
        type: 'Function',
        required: false,
    },