Missing example how to implement refresh on a functional component

Hello!

Here is an example how to implement refresh on a class component: https://github.com/ag-grid/ag-grid-react-example/blob/8aa7ab541c3c4a30f5b4867d88d8704e93b3f549/src-trader-dashboard/components/renderers/HorizontalBarComponent.jsx#L48

But we use only functional components. Is it not possible or just missing example?