default int evictBlocksRangeByHfileName(String hfileName, long initOffset, long endOffset) {
    return 0;
  }
Evict all blocks for the given file name between the passed offset values.
@param hfileName  The file for which blocks should be evicted.
@param initOffset the initial offset for the range of blocks to be evicted.
@param endOffset  the end offset for the range of blocks to be evicted.
@return number of blocks evicted.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java