title: Highchart sankey- Show multiple entries having same name independently
body: <p>I have a requirement that in case of an example like </p>
  
  <p>I want the two r1s to appear independently on their respective axis 
  I.e </p>
  
  <p>I want something like</p>
  
  <pre><code>l1 - r1 
  
  l3 - r1 
  
  l2 - r2
  
  r1 - r3
  </code></pre>
  
  <p>i.e the 2 r1s should exist independently on the correct sides I.e the ‘from and’to’sides depending on their position in the array of data say having keys [‘from’ ,’to’, ‘weight’</p>
  
  <p>I do not want </p>
  
  <pre><code>L1 - r1 - r3
  </code></pre>