In my UML class-diagram, I would like to show the "implements", "depends-on",
"inherits" relationships for classes that are contained a jar file. The jar file
has already been added as a library via Library Manager, to a pure-Java project,
and Reverse-Engineered, s.t. I can browse down to the classifier
(class/interface) definition in the jar, via the property-window. I was hoping
to be able to drag-n-drop the class-definition from there, onto the "External
Imports" node in my UML model project. I can't.
 
So, could someone please suggest the right way to do this, i.e. achieve the same
effect ? I have lots of such classes in jar's for which I don't have source
code, and it'd be too painful to create all those diagrams by hand.