public static void showJCas(JCas jcas) {
   FSIterator<Annotation> it = jcas.getAnnotationIndex().iterator();
   Map<String, MutableInt> counters = new TreeMap<String, MutableInt>();
   int total = 0;
   while (it.hasNext()) {
     total += 1;
     String annoType = "rien";
     try {
       Annotation annotation = (Annotation) it.next();
       annoType = annotation.getType().getName();
     } catch (NullPointerException e) {
       it.moveToNext();
       annoType = e.getClass().getCanonicalName();
     }
     if (counters.get(annoType) == null) {
       counters.put(annoType, new MutableInt(1));
     } else {
       counters.get(annoType).increment();
     }
   }
   System.out.println(
       "Total annotation in JCas (ID: " + System.identityHashCode(jcas) + "): " + total);
   for (String annoType : counters.keySet()) {
     System.out.println(annoType + ": " + counters.get(annoType));
   }
 }