UML no fields (state) in class

Question

If my class (interface) has no fields, should I leave white space to make it obvious that there is to state?

With whitespace:

No whitespace:

Answer 1

I'd use with whitespace. I've seen some examples on the web like this (https://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/). In Figure 10, The Person interface has no methods, but the space to put methods is present.