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How to add tooltip on each table column?


i am working on splunk cloud , i don't have access to server and i am using dashboard studio . 
This is my table code also i have attached the screenshot of my table , so i just want to know how can i add tooltip to each column header of my table.

"viz_zfv78G8Y": {
"type": "splunk.table",
"title": "GP Metrics",
"options": {
"tableFormat": {
"align": "> table |pick(alignment)"
"columnFormat": {
"messegetype": {
"data": "> table | seriesByName(\"messegetype\") | formatByType(messegetypeColumnFormatEditorConfig)"
"dataSources": {
"primary": "ds_f9ztfdW3"
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