docs: public Class<?>[] getClasses(String name, Class<?>... defaultValue) {
          String[] classnames = getStrings(name);
          if (classnames == null)
              return defaultValue;
          try {
              Class<?>[] classes = new Class<?>[classnames.length];
              for (int i = 0; i < classnames.length; i++) {
                  classes[i] = getClassByName(classnames[i]);
              }
              return classes;
          } catch (ClassNotFoundException e) {
              throw new RuntimeException(e);
          }
      }