code: protected void writeGenerator( String function, ITestCaseGenerator generator)
      {
      if( !generator.getClass().equals( TupleGenerator.class))
        {
        throw
          new UnsupportedOperationException
          ( "Can't write generator=" + generator
            + ": only TupleGenerator currently supported");
        }
  
      writeTupleGenerator( function, (TupleGenerator) generator);
      }
docs: Writes the given generator definition.