code: public static void loadAllTagClasses() {
  
          final Map<String, Class<?>> unloadedClasses = new HashMap<>();
  
          for (final Entry<String, Class<?>> entry : tagClassByTagNameTmp
                  .entrySet()) {
              try {
  
                  Class.forName(entry.getValue().getName());
  
              } catch (final ClassNotFoundException e) {
                  unloadedClasses.put(entry.getKey(), entry.getValue());
                  if (LOGGER.isLoggable(Level.WARNING)) {
                      LOGGER.warning("Could not load tag class "
                              + entry.getValue().getName());
                  }
  
              }
          }
          tagClassByTagNameTmp.clear();
          if (unloadedClasses.size() > 0) {
              tagClassByTagNameTmp.putAll(unloadedClasses);
          } else {
              tagClassByTagNameTmp = null;
          }
      }
docs: Loads all tag classes.
  
  @since 2.1.13
  @author WFF