If one models a class:
 - when creating a new private attribute => getter and setter is generated
 - when generating code => the getters and setters are also implemented
 (not just stubs)

If one creates a Class Element from existing code:
 - when generating code => the getters and setters are just stubs

=> this feature isn't being displayed and one cannot set a rev. eng.
   class's attributes to have getters and setters.


Possible solution:

When selecting an attribute, the property list should contain two extra entries:
 1) name="read with"
    value= a combo box with "NONE" + the class methods
           filtered: params.length==0
                     &&
                     return.getClass()==attribute.getClass()
 2) name="write with"
    value= a combo box with "NONE" + the class methods
           filtered: params.length==1
                     &&
                     params[0].getClass()==attribute.getClass()
                     &&
                     return.getClass()==Void.getClass()

=> one can configure the model such that code generation also implements
   the getter and setter stubs.