function handleMouseOver(d,i) {
let nodeIndex = d.target.__data__.hasOwnProperty("index")? d.target.__data__.index : getNodeIndex(switchingGraph.nodes, d.target.__data__.impacted)
d3.select(`#rank_node_${nodeIndex} circle`)
.attr("fill", "grey")
d3.select(`text#ranktext_node_${nodeIndex}`)
.attr("fill", "#fff")
d3.select(`#node_${nodeIndex} circle.image-mask`)
.attr("stroke", "grey")
}