title: How to unsubscribe from event handler in SignalR hub proxy?
body: <p>I am working with JavaScript SignalR client. I open hub connection like:</p>
  
  <pre><code>hubConnection = $.hubConnection(url);
  proxy= hubConnection.createHubProxy('SomeHub');
  </code></pre>
  
  <p>When I want to subscribe to some hub event: </p>
  
  <pre><code>proxy.on("someEvent", function(someData){
      console.log(someData);
  });
  </code></pre>
  
  <p>How do I unsubscribe from listening hub event? I tried with proxy.off("someEvent"); but it doesn't work.</p>