Column filters in grid

Hi,
I see in the grid example in the sampler - http://demo.vaadin.com/sampler/#ui/grids-and-trees/grid/features
A drop down menu with the column acting as a hide/show filter for grid columns.
How is that used? I saw no mention of that in the documentation.
Thanks

Hi!
You can make a column hideable by calling 

grid.getColumn(colId).setHidable(true);

and if you want it hidden to start with just call 

column.setHidden(true);

as well.