title: Group by function in JavaFX table
body: <p>We are migrating swt/nattable applications to the new java8 and Javafx8.</p>
  
  <p>Everything is going smooth but one feature of nattable cannot be found. The feature we are searching for is the "group by" feature. So we need a library/implementation to drag/drop columns on a label and with those columns a group by in the table. Can someone help us with this? </p>
  
  <p>How the group by feature is working in Nattable.</p>
  
  <p>There are two main components the table itself and the dropzone of the different columns. When a user drag a columns to the dropzone the table will groups the values of that column together (like the Group by in SQL). After that the table will show the result of that group by operation.</p>