If you have an object class that’s on a lot of sequence diagrams and it’s getting and sending a lot of messages, that’s a good indication it’s a fairly dynamic object class and it should probably have a state chart for it.
Kama una kitu darasa hiyo ni juu ya mengi ya vielelezo mlolongo na ni kupata na kutuma mengi ya ujumbe, hiyo ni dalili nzuri ni haki nguvu kitu darasani na ni lazima pengine kuwa na hali chati kwa hilo.