title: jsplumb create curved connection
body: <p>I have a diagram with state machine connectors, </p>
  
  <pre><code>instance.connect(
                                 {
                                     source: "estadoDg-1" ,
                                     target: "estadoDg-2" ,
                                     //connector: ["StateMachine", { proximityLimit: 0, curviness: -46 }]
                                 });
  </code></pre>
  
  <p>As you can see in the image green connector is background of second element,
  I want to curve connector like red line (ref)..</p>
  
  <p>thanks</p>
  
  <p><img src="https://i.stack.imgur.com/722Cd.png" alt="jsplumb diagram"></p>