code: function( editor )
  	{
  		try
  		{
  			var selection = editor.getSelection();
  			if ( selection.getType() == CKEDITOR.SELECTION_ELEMENT )
  			{
  				var selectedElement = selection.getSelectedElement();
  				if ( selectedElement.is( 'a' ) )
  					return selectedElement;
  			}
  
  			var range = selection.getRanges( true )[ 0 ];
  			range.shrink( CKEDITOR.SHRINK_TEXT );
  			var root = range.getCommonAncestor();
  			return root.getAscendant( 'a', true );
  		}
  		catch( e ) { return null; }
  	}
docs: Get the surrounding link element of current selection.
  @param editor
  @example CKEDITOR.plugins.link.getSelectedLink( editor );
  @since 3.2.1
  The following selection will all return the link element.
  <pre>
  <a href="#">li^nk</a>
  <a href="#">[link]</a>
  text[<a href="#">link]</a>
  <a href="#">li[nk</a>]
  [<b><a href="#">li]nk</a></b>]
  [<a href="#"><b>li]nk</b></a>
  </pre>