code: private ClassDescriptorDef ensureClassDef(XClass original)
      {
          String             name     = original.getQualifiedName();
          ClassDescriptorDef classDef = _model.getClass(name);
  
          if (classDef == null)
          {
              classDef = new ClassDescriptorDef(original);
              _model.addClass(classDef);
          }
          return classDef;
      }
docs: Makes sure that there is a class definition for the given qualified name, and returns it.
  
  @param original The XDoclet class object
  @return The class definition