return (NavigableMap<K, V>) map;
    }

    @Override
    public @Nullable K lower(@ParametricNullness K e) {
      return map().lowerKey(e);
    }

    @Override
    public @Nullable K floor(@ParametricNullness K e) {
      return map().floorKey(e);
    }

    @Override
    public @Nullable K ceiling(@ParametricNullness K e) {
      return map().ceilingKey(e);
    }

    @Override

}\n\n/**\n * Public Util API\n */\n\nconst Util = {\n  TRANSITION_END: 'bsTransitionEnd',\n\n  getUID(prefix) {\n    do {\n      // eslint-disable-next-line no-bitwise\n      prefix += ~~(Math.random() * MAX_UID) // \"~~\" acts like a faster Math.floor() here\n    } while (document.getElementById(prefix))\n\n    return prefix\n  },\n\n  getSelectorFromElement(element) {\n    let selector = element.getAttribute('data-target')\n\n    if (!selector || selector === '#') {\n      const hrefAttr = ele...