code: @SuppressWarnings("unchecked")
    public <T extends ConfigurationSection> T getSection(Class<T> sectionType) {
      for (ConfigurationSection s : sections) {
        if (sectionType.equals(s.getClass())) {
          return (T) s;
        }
      }
      return null;
    }
docs: Retrieve a single section from the container.