Multimarkdown tables with pandoc
<p>Is it possible to render in pandoc a Multimarkdown <a href="https://github.com/fletcher/MultiMarkdown/wiki/MultiMarkdown-Syntax-Guide#tables" rel="nofollow">table</a> with collapsible columns like in the example:</p>

<pre><code>|             |          Grouping           ||
First Header  | Second Header | Third Header |
 ------------ | :-----------: | -----------: |
Content       |          *Long Cell*        ||
Content       |   **Cell**    |         Cell |

New section   |     More      |         Data |
And more      |            And more          ||
</code></pre>

<p>By collapsible, I mean these columns that expand across others, and are represented by the repetition of pipes.</p>

<p>At the pandoc manual it is stated that:</p>

<blockquote>
  <p>Pandoc ... can read Markdown, CommonMark, PHP Markdown Extra,
  GitHub-Flavored Markdown, <strong>MultiMarkdown</strong>,...</p>
</blockquote>

<p>But if I run the code above it will not render properly. What am I doing wrong? Am I wrong to suppose this syntax is supported? Or should I activate a flag in order to get Multimarkdown support?</p>