code: public void associateClass( Class<?> clas ) {
          if ( Reflect.isGeneratedClass(clas) )
              associatedClasses.put( clas.getName(), clas );
      }
docs: Associate a persistent generated class implementation with this
  interpreter.  An associated class will be used in lieu of generating
  bytecode when a scripted class of the same name is encountered.
  When such a class is defined in the script it will cause the associated
  existing class implementation to be initialized (with the static
  initializer field).  This is utilized by the persistent class generator
  to allow a generated class to bootstrap an interpreter and rendesvous
  with its implementation script.
  
  Class associations currently last for the life of the class manager.