Add vertical line to stacked horizontal bar chart
<p>I'd like to do the same thing described in <a href="https://stackoverflow.com/questions/23535668/drawing-visual-lines-in-google-charts">this question</a>, except that I want to do it for a horizontal bar chart (the bars are horizontal instead of vertical).  I'll copy the image from that question here:</p>

<p><a href="https://i.stack.imgur.com/biCXB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/biCXB.png" alt="enter image description here"></a></p>

<p>I'd like to have a stacked horizontal bar chart similar to this with a vertical line.</p>

<p>It seems that <code>ComboCharts</code> doesn't support horizontal bar charts so I was hoping there might be another way.</p>