我需要帮助从 React-Leaflet 创建 GeoJSON 自定义组件

使用 React 和 React-Leaflet 编写（两个都是最新版本）代码在 Map 组件中写入时有效，但我想将其导入/导出以拆分代码

import React from 'react';
import { withLeaflet, GeoJSON } from 'react-leaflet'
import L from 'leaflet'


class CustomGesJSON extends GeoJSON {

    getStyle(feature) {
        // some code
    }

    pointToLayer(feature, latlng) {
        // some code
    }

    onEachFeature(feature, layer) {
        // some code
    }

    createLeafletElement(opts) {
        const CustomGesJSON = L.geoJSON.extend({

            onAdd: (map) => {
                this.getStyle = this.getStyle.bind(this);
                this.pointToLayer = this.pointToLayer.bind(this);
                this.onEachFeature = this.onEachFeature.bind(this);

                return this ;
            }
        });
        return new CustomGesJSON({ data: this.props.data });
    }


} 

function testlog(txt) {
    // some code
}

export default withLeaflet(CustomGesJSON);

我收到一条错误消息“GeoJSON 不是构造函数”

函数和方法（这里不显示）有效，我只需要帮助进行适当的继承 其他解决方案欢迎

谢谢你的帮助