docs: public int getIndexForPosition(int position) {
          int nSections = 0;
  
          Set<Entry<String, Integer>> entrySet = mSections.entrySet();
          for(Entry<String, Integer> entry : entrySet) {
              if(entry.getValue() < position) {
                  nSections++;
              }
          }
  
          return position - nSections;
      }