Each modeled bean has underlying Java source files which contain the implementation code for that element. These implementation files can be displayed on the diagram as modeled Java classes.
          Select the bean on the diagram, the Java implementation of which you 
          want to model on the diagram, then choose Model  Show
Show  Implementation Files.
Implementation Files.
OR
        
          Right-click the bean on the diagram, the Java implementation of 
          which you want to model on the diagram, then choose 
Show Implementation  Files.
Files.
        
Displaying the Source Code for a Modeled Bean
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