text: 10 Note that if you have an instance of a class selected in the Individuals by type (inferred) view, you won’t be able 
  to collapse that class. E.g., in figure 8.2 we wouldn’t be able to collapse the Employee class because one of its 
  instances (Chef) is selected. To collapse it just select a different instance that isn’t an instance of the class you 
  want to collapse. 
  
  64 