Hello,
Sometimes when we do a class diagram we are more focused on the hierarchies without the need to specifying members. It would be nice for a class that doesn't have information in terms of members to only draw the icon and the name part of the rectangle.
For example :
@startuml
Class01 <|-- Class02
Class03 *-- Class04
Class05 o-- Class06
Class07 .. Class08
Class09 -- Class10
@enduml
A lot of space is used for nothing ( second and third stage are empty ).
Thanks,
Kasra