@Override
  public byte get(int index) {
    checkRefCount();
    int itemIndex = getItemIndex(index);
    return ByteBufferUtils.toByte(this.items[itemIndex], index - this.itemBeginPos[itemIndex]);
  }
Fetches the byte at the given index. Does not change position of the underlying ByteBuffers
@return the byte at the given index
hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java