What problem does this feature solve?

When I use the relational drawing network topology map, when the node number 5000 interaction is poor.
so, I hope echarts add thumbnails to the diagram

What does the proposed API look like?

series: {
    type:'graph',
    thumbnails: {
         x: 'xx',
         y: 'xxx',
         itemStyle:{},
        lineStyle:{}
    }
}

Demo as shown below: