public void displayState() {
        PrintWriter xout = context.get(Log.outKey);
        xout.println("File Object History : " +  fileObjectHistory);
        xout.println("Open Type Names     : " +  openTypeNames);
        xout.println("Gen. Src Names      : " +  generatedSourceNames);
        xout.println("Gen. Cls Names      : " +  generatedClasses.keySet());
        xout.println("Agg. Gen. Src Names : " +  aggregateGeneratedSourceNames);
        xout.println("Agg. Gen. Cls Names : " +  aggregateGeneratedClassNames);
    }