docs: function(selector) {
          var target = jQuery(selector);
  
          Ember.assert("You tried to append to (" + selector + ") but that isn't in the DOM", target.length > 0);
          Ember.assert("You cannot append to an existing Ember.View. Consider using Ember.ContainerView instead.", !target.is('.ember-view') && !target.parents().is('.ember-view'));
  
          this.constructor.renderer.appendTo(this, target[0]);
  
          return this;
        }