GridLayout always visible sum row

I have a rather specific Question.

I have a GridLayout

The Grid has quit complex creating, filtering and sorting logic but it looks nice
and it is not an exel Clone (victory :smiley: !)

Now the Problem i have is = the lowest Row of components (sumRow) is sometimes not visible on screen.

The Request is to allways have it visible on screen, like in Exel / Default Vaadin Grid.

I realy do not want to recalculate and rebuild the grid “on scroll” and push the sumRow to the lowest visible place on screen “depending on screenresolution e.t.c.”

One pragmatic solution is to pack the sumRow to the Top, but it is counter Intuitiv.

Is my Problem understandable and does anyone of you have some ideas ?

Im on Vaadin 8.5.1