title: Javafx : Restrict Column rearrangement on drag and drop
body: <p>In a tree table view, we can re-arrange the columns by dragging the column headers.
  I want to restrict the user from dragging the <strong>first column alone</strong>. Which means my first column should be the first column all the time.</p>
  
  <p>Is this possible?</p>
  
  <p>Thanks in advance.</p>