code: synchronized void increaseLength(long delta) {
          Preconditions.checkState(!this.sealed, "Cannot increase the length of a sealed SegmentChunk.");
          Preconditions.checkArgument(delta >= 0, "Cannot decrease the length of a SegmentChunk.");
          this.length += delta;
      }
docs: Increases the length of the SegmentChunk by the given delta.
  @param delta The value to increase by.