title: Create nattable with two column ,the second column has multiple dynamic rows inside
body: <p>I am trying to  create a table in <code>NatTable</code> that has two columns.
  The first column is straight-forward but I need help while creating the second one.
  Each cell of the second column has to have a dynamic number of rows, like in the image provided. In other words, each cell of the second column is divided into a variable number of rows.
  I am using <code>NatTable</code> because of it's capacity to handle large data. But any solution is good at this point. (JFace etc)</p>
  
  <p><a href="https://i.stack.imgur.com/gByXj.png" rel="nofollow noreferrer">This is what I am trying to achieve (image)</a></p>