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antd v4版本Table虚拟列表组件 这段代码的作用是什么

虚拟列表

Object.defineProperty(obj, 'scrollLeft', {
        get: () => null,
        set: scrollLeft => {
            if (gridRef.current) {
                gridRef.current.scrollTo({
                    scrollLeft
                });
            }
        }
    });

官方解释是:“Table 标题滚动的时候,同步 Grid 滚动”

但我删除这段代码Table也能正常运行,求解


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