appsdk2 - Hiding specific columns within a custom HTML Rally app using the SDK -

i'm writing cardboard app using appsdk within custom html app. far, displaying (rendering columns, column headers).

is there way target , hide columns , headers within cardboard app code? can hide them using css id's.... however, occurs after app has rendered , results in bit of eyesore original app width not resize.

tl;dr rally custom kanban board (appsdk) contains 6 user story states. want hide second , fourth states while still showing other four.

there's example in docs show how create board has specific set of columns: https://help.rallydev.com/apps/2.1/doc/#!/example/specific-columns-board

in case it's doing owners columns , stuff custom rendering of headers, guts of specifying columns config board, array of config objects used instantiate rally.ui.cardboard.column objects.