title: Issues removing markers from worldmap on node-red
body: <p>I have multiple markers with different name on my worldmap running on node-red. I can delete them one by one with the following code:</p>
  <p>markers:</p>
  <pre><code>1. msg.payload = {&quot;name&quot;:&quot;Delivery-2&quot;,&quot;lat&quot;:55.87782,&quot;lon&quot;:-4.32508};
  return msg;
  
  2. msg.payload = {&quot;icon&quot;:&quot;car&quot;, &quot;name&quot;:&quot;Delivery-3&quot;,&quot;lat&quot;:55.87782,&quot;lon&quot;:-4.32308};
  return msg;
  </code></pre>
  <p>delete Marker code:</p>
  <pre><code>msg.payload = {&quot;name&quot;:&quot;Delivery-3&quot;, &quot;deleted&quot;: true};
  return msg;
  </code></pre>
  <p>I am searching for the best way to delete all the markers with a single code</p>