private void CoalesceArea(long offset, long size)
{
BytesUtil.WriteInt8(size, headerBuf, 0);
// ISSUE: Boundary alteration is a moment when corruption could occur.
// There are two seeks and writes here and when we are setting the
// end points, there is a risk of failure.
Write(offset, headerBuf, 0, 8);
Write((offset + size) - 8, headerBuf, 0, 8);
}