@Override
  public byte get() {
    checkRefCount();
    if (this.curItem.remaining() == 0) {
      if (items.length - 1 == this.curItemIndex) {
        // means cur item is the last one and we wont be able to read a long. Throw exception
        throw new BufferUnderflowException();
      }
      this.curItemIndex++;
      this.curItem = this.items[this.curItemIndex];
    }
    return this.curItem.get();
  }
A relative method that returns byte at the current position. Increments the current position by
the size of a byte.
@return the byte at the current position
hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java