title: How to access a scene by name or id in three.js, no scene.childs just scenes
body: <p>I try this <a href="https://stackoverflow.com/questions/36714763/three-js-how-to-get-scene-by-idname">three.js how to get scene by id(name)</a></p>
  
  <p>and I get this error</p>
  
  <blockquote>
    <p>Uncaught TypeError: THREE.getObjectByName is not a function</p>
  </blockquote>
  
  <p>why I can't access a scene by name or id????</p>
  
  <p>the code is that </p>
  
  <pre><code>// setup scenes
  var scene-1 = new THREE.Scene();
  scene-1.add('cube_red');
  
  var scene-2 = new THREE.Scene();
  scene-2.add('cube_green');
  
  // get scenes by name
  var sceneObj = THREE.Object3D.getObjectByName("scene-1");
  console.log(sceneObj.userData.someProp);
  
  // or 
  
  selectedScene = THREE.Object3D.getObjectByName("scene-1");
  </code></pre>
  
  <p>Any suggestion?</p>