How to use the @nivo/line.LineDefaultProps.curve function in @nivo/line

key: 'margin',
        help: 'Chart margin.',
        type: 'object',
        required: false,
        controlType: 'margin',
        group: 'Base',
    },
    {
        key: 'curve',
        help: 'Curve interpolation.',
        description: `
            Defines the curve factory to use for the line generator.
        `,
        type: 'string',
        required: false,
        defaultValue: defaults.curve,
        controlType: 'choices',
        group: 'Style',
        controlOptions: {
            choices: lineCurvePropKeys.map(key => ({
                label: key,
                value: key,
            })),
        },
    },
    {
        key: 'colors',
        help: 'Defines color range.',
        type: 'string | Function | string[]',
        required: false,
        defaultValue: defaults.colors,
        controlType: 'ordinalColors',