docs: public static Map<String, Map<String, String>> loadedFilters() {
      final Map<String, Map<String, String>> filters = 
          new HashMap<String, Map<String, String>>(tagv_filter_map.size());
      for (final Pair<Class<?>, Constructor<? extends TagVFilter>> pair : 
          tagv_filter_map.values()) {
        final Map<String, String> filter_meta = new HashMap<String, String>(1);
        try {
          Method method = pair.getKey().getDeclaredMethod("description");
          filter_meta.put("description", (String)method.invoke(null));
          
          method = pair.getKey().getDeclaredMethod("examples");
          filter_meta.put("examples", (String)method.invoke(null));
          
          final Field filter_name = pair.getKey().getDeclaredField("FILTER_NAME");
          filters.put((String)filter_name.get(null), filter_meta);
        } catch (SecurityException e) {
          throw new RuntimeException("Unexpected security exception", e);
        } catch (NoSuchMethodException e) {
          LOG.error("Filter plugin " + pair.getClass().getCanonicalName() + 
              " did not implement one of the \"description\" or \"examples\" methods");
        } catch (NoSuchFieldException e) {
          LOG.error("Filter plugin " + pair.getClass().getCanonicalName() + 
              " did not have the \"FILTER_NAME\" field");
        } catch (IllegalArgumentException e) {
          throw new RuntimeException("Unexpected exception", e);
        } catch (IllegalAccessException e) {
          throw new RuntimeException("Unexpected security exception", e);
        } catch (InvocationTargetException e) {
          throw new RuntimeException("Unexpected security exception", e);
        }
        
      }
      return filters;
    }