public MobCell resolve(ExtendedCell reference, boolean cacheBlocks) throws IOException {
    return resolve(reference, cacheBlocks, -1, true);
  }
Reads the cell from the mob file, and the read point does not count. This is used for
DefaultMobStoreCompactor where we can read empty value for the missing cell.
@param reference   The cell found in the HBase, its value is a path to a mob file.
@param cacheBlocks Whether the scanner should cache blocks.
@return The cell found in the mob file.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java