What's wrong in this CreateFakeObject API Code?

  function Fake()
   {
      var editor = CKEDITOR.instances.editor1;
	  var element = CKEDITOR.dom.element.createFromHtml( '<div class="bold"><b>Example</b></div>' );
	  alert( element.getOuterHtml() ); 
	  editor.createFakeElement( element, 'fakegallery', 'div', false );
      
   }

It doesn't work and no error in javascript console.

fakegallery is a css class!