[Pharo-project] OBConfirmationRequest without cancel and input

Hi Lukas. I was taking a look to the OBDefinitionPanel >> aboutToChange: because it sucks for me those popups. First, it has a TWO cancel option, and an input (to type and subselect items from the menu) that has no sense for two only options. So, I would like something simple. I want a popup with a label: "'Changes have not been saved." and two simple buttons: "save" and "discard". Not hirzontal selection lines, but buttons. I take a look into the methods and hierrarchy of OBInteractionRequest but I didn't find how to do it. Thanks in advance for any hints you can give me. Cheers Mariano