js/libs/ember-1.5.1.js
function(klass) {
    var view = get(this, 'parentView');

    while (view) {
      if (get(view, 'parentView') instanceof klass) { return view; }
      view = get(view, 'parentView');
    }
  }
function(klass) {
    var view = get(this, 'parentView');

    while (view) {
      if (get(view, 'parentView') instanceof klass) { return view; }
      view = get(view, 'parentView');
    }
  }
Return the nearest ancestor whose parent is an instance of
`klass`.

@method nearestChildOf
@param {Class} klass Subclass of Ember.View (or Ember.View itself)
@return Ember.View