code: function( selector ) {
  			var removeTmpId = createTmpId( this ),
  				found = this.$.querySelector( getContextualizedSelector( this, selector ) );
  
  			removeTmpId();
  
  			return found ? new CKEDITOR.dom.element( found ) : null;
  		}
docs: Returns first element within this element that matches specified `selector`.
  
  **Notes:**
  
  * Not available in IE7.
  * Unlike native `querySelectorAll` this method ensures selector contextualization. This is:
  
  HTML:		'<body><div><i>foo</i></div></body>'
  Native:		div.querySelector( 'body i' ) // ->			<i>foo</i>
  Method:		div.findOne( 'body i' ) // ->				null
  div.findOne( 'i' ) // ->					<i>foo</i>
  
  @since 4.3
  @param {String} selector
  @returns {CKEDITOR.dom.element}