How to use the @nivo/circle-packing.BubbleDefaultProps.leavesOnly function in @nivo/circle-packing

default: 'Depends on device',
        type: `{number}`,
        controlType: 'range',
        controlGroup: 'Base',
        controlOptions: {
            min: 1,
            max: 2,
        },
    },
    {
        key: 'leavesOnly',
        scopes: '*',
        description: 'Only render leaf nodes (skip parent nodes).',
        type: '{boolean}',
        required: false,
        default: defaults.leavesOnly,
        controlType: 'switch',
        controlGroup: 'Base',
    },
    {
        key: 'padding',
        scopes: '*',
        description: (
            <span>
                sets the approximate padding between adjacent circles, in pixels. see{' '}
                <a rel="noopener noreferrer" href="https://github.com/d3/d3-hierarchy#pack_padding">
                    official d3 documentation
                </a></span>

required: false,
        defaultValue: 'Depends on device',
        type: `number`,
        controlType: 'range',
        group: 'Base',
        controlOptions: {
            min: 1,
            max: 2,
        },
    },
    {
        key: 'leavesOnly',
        help: 'Only render leaf nodes (skip parent nodes).',
        type: 'boolean',
        required: false,
        defaultValue: defaults.leavesOnly,
        controlType: 'switch',
        group: 'Base',
    },
    {
        key: 'margin',
        help: 'Chart margin.',
        type: 'object',
        required: false,
        controlType: 'margin',
        group: 'Base',
    },
    {
        key: 'padding',
        help: 'Padding between each circle.',
        description: `
            Padding between adjacent circles.