code: function handlebarsGet(root, path, options) {
        var data = options && options.data;
        var normalizedPath = normalizePath(root, path, data);
        var value;
  
        // In cases where the path begins with a keyword, change the
        // root to the value represented by that keyword, and ensure
        // the path is relative to it.
        root = normalizedPath.root;
        path = normalizedPath.path;
  
        // Ember.get with a null root and GlobalPath will fall back to
        // Ember.lookup, which is no longer allowed in templates.
        //
        // But when outputting a primitive, root will be the primitive
        // and path a blank string. These primitives should pass through
        // to `get`.
        if (root || path === '') {
          value = get(root, path);
        }
  
        if (detectIsGlobal(path)) {
          if (value === undefined && root !== Ember.lookup) {
            root = Ember.lookup;
            value = get(root, path);
          }
          if (root === Ember.lookup || root === null) {
            Ember.deprecate("Global lookup of "+path+" from a Handlebars template is deprecated.");
          }
        }
  
        return value;
      }
docs: Lookup both on root and on window. If the path starts with
  a keyword, the corresponding object will be looked up in the
  template's data hash and used to resolve the path.
  
  @method get
  @for Ember.Handlebars
  @param {Object} root The object to look up the property on
  @param {String} path The path to be lookedup
  @param {Object} options The template's option hash