code: function( fn ) {
  			for ( var i in this._.contents ) {
  				for ( var j in this._.contents[ i ] )
  					fn.call( this, this._.contents[ i ][ j ] );
  			}
  			return this;
  		}
docs: Executes a function for each UI element.
  
  @param {Function} fn Function to execute for each UI element.
  @returns {CKEDITOR.dialog} The current dialog object.