title: Apache Camel : How to setHeader value as null
body: <p>How do we set header value as null in apache camel exchange message from a processor. I am delivering message to a RabbitMQ exchange and it expects one of the header value to be set as null.</p>
  
  <p>I have tried below approaches from my processor just before delivering the message</p>
  
  <pre><code>exchange.getOut().setHeader("headername","");
  </code></pre>
  
  <p>But this sets up an empty string to the header.</p>
  
  <p>I also tried </p>
  
  <pre><code>exchange.getOut().setHeader("headername",null);
  </code></pre>
  
  <p>But in this case the header itself is not visible. </p>
  
  <p>Please let me know if any more information is needed.</p>