Add empty column in grid

how add a empty column in a grid? And put a button in all fields in this column.

grid = new Grid<>();
grid.setWidth("100%");
grid.setHeight("350px");

grid.addColumn(ProductType::getOP).setCaption("O.P.").setId("OP");

You can add an arbitrary column like this:

grid.addColumn(unused -> "My Button Caption", new ButtonRenderer()) .setCaption("Button Column"); Hope this helps
//Teemu