I have a question regarding multiplicity. For example, I defined a part usage named vehicle, which owns a part usage feature called wheel, with the multiplicity of wheel set to [4], intending to express that a vehicle contains four wheels. However, when I switch to the Symbolic View and enable Display Features, only a single part feature is shown. As a result, I am unable to separately define interfaces between the vehicle and each of the four wheels. I would like to understand whether this behavior indicates an error in my modeling approach, or whether it reflects the intended semantics and tool behavior of SysML.