code: function( cssFileUrl )
  		{
  			if ( this.$.createStyleSheet )
  				this.$.createStyleSheet( cssFileUrl );
  			else
  			{
  				var link = new CKEDITOR.dom.element( 'link' );
  				link.setAttributes(
  					{
  						rel		:'stylesheet',
  						type	: 'text/css',
  						href	: cssFileUrl
  					});
  
  				this.getHead().append( link );
  			}
  		}
docs: Appends a CSS file to the document.
  @param {String} cssFileUrl The CSS file URL.
  @example
  <b>CKEDITOR.document.appendStyleSheet( '/mystyles.css' )</b>;