code: private int compareToFIFO( CacheEntry other ) {
          int cmp = compareOrder( other );
          if ( cmp != 0 ) {
              return cmp;
          }
  
  
          cmp = compareTime( other );
          if ( cmp != 0 ) {
              return cmp;
          }
  
  
          return cmp = compareReadCount( other );
      }
docs: Compare for FIFO
  @param other the other entry
  @return results