AMCharts 4 Directed Tree – Find a Node and Zoom it

I’m trying to search a node in a Force Directed Tree with Amcharts 4 using JavaScript. After I found the node, I’d like to zoom the chart on the node.

I’m trying to search the node by its name in the DOM but it’s not working as expected.

chart.zoomToDataItem(itemToFind, zoom = 1.85, true);

Unfortunatly I don’t know how to find an item, and I can’t find in the doc either. Does any one can help me ?

Thank you for your help,

Kind Regards