如何在 google 猫的折线图中的交点处显示气泡或正方形

How to show bubbles or square at the point of intercetion in line chart of google chats

我使用 google 图表创建了折线图,我想在图表的交叉点显示气泡或正方形。 我如何实现它?

I have checked google api and found the solutions as below which is working as expected for me:-

     > pointSize: 6,
     > pointShape: { type: 'circle' },