code: function() {
  			var $ = this.$;
  
  			try {
  				// In IE, with custom document.domain, it may happen that
  				// the iframe is not yet available, resulting in "Access
  				// Denied" for the following property access.
  				$.contentWindow.document;
  			} catch ( e ) {
  				// Trick to solve this issue, forcing the iframe to get ready
  				// by simply setting its "src" property.
  				$.src = $.src;
  			}
  
  			return $ && new CKEDITOR.dom.document( $.contentWindow.document );
  		}
docs: Returns the inner document of this `<iframe>` element.
  
  @returns {CKEDITOR.dom.document} The inner document.