public void handleCacheCollision(DataCache cache,
      MemoryBuffer replacementBuffer, List<MemoryBuffer> cacheBuffers) {
    throw new UnsupportedOperationException();
  }
DiskRange containing encoded, uncompressed data from cache.
It should be hidden inside EncodedReaderImpl, but we need to expose it for tests.
ql/src/java/org/apache/hadoop/hive/ql/io/orc/encoded/CacheChunk.java