docs: Map.Entry<Integer, Map.Entry> getNearestAnchorEntry() {
          int anchorCount = anchorList.size();
          if (page == 0 || anchorCount == 0) {
              return NULL_ANCHOR;
          }
  
          Map.Entry anchoredEntry;
          if (page < anchorCount) {
              anchoredEntry = anchorList.get(page - 1);
          } else {
              anchoredEntry = anchorList.get(anchorCount - 1);
          }
          return anchoredEntry;
      }