to remember here, is that a collaboration diagram is just a different view of a scenario and you can go back and forth between sequence diagrams and collaboration diagrams to get the view that best illustrates your point.
kukumbuka hapa, ni kwamba mchoro ushirikiano ni tu mtazamo tofauti ya mazingira na unaweza kwenda na kurudi kati ya vielelezo mlolongo na vielelezo kushirikiana ili kupata maoni kwamba bora unaeleza hatua yako.