Getting the visible rows of a grid

I'm currently migrating my application from table to grid. With the table I am able to get the first line that is currently visible however I have not found that in grid. Is it possible ?

Currently, I believe only the client side of the Grid knows this. Please create an enhancement request at https://github.com/vaadin/framework/issues for this.

Request created. https://github.com/vaadin/framework/issues/9708
Thank you