code: protected void displayMessageAtTheBeginningOfMethod(String methodName, String act, String concernedActivity, List<String> concernedActivities) {
          logger.debug("{} {}: {} with {} concernedActivity(ies)", act, methodName, concernedActivity, concernedActivities.size());
          int i = 0;
          for (final String activity : concernedActivities) {
              i++;
              logger.debug("  activity N°{}={}", i, activity);
          }
      }
docs: Displays message (concerned activity and list of authorized activities) at the beginning of method in logs.
  
  @param methodName
  is name of java method
  @param act
  is name of activity
  @param concernedActivity
  is concerned activity
  @param concernedActivities
  is a list of authorized activities