code: function getFixTableSelectionWalker( testRange ) {
  			var walker = new CKEDITOR.dom.walker( testRange );
  			walker.guard = function( node, isMovingOut ) {
  				if ( isMovingOut )
  					return false;
  				if ( node.type == CKEDITOR.NODE_ELEMENT )
  					return node.is( CKEDITOR.dtd.$tableContent );
  			};
  			walker.evaluator = function( node ) {
  				return node.type == CKEDITOR.NODE_ELEMENT;
  			};
  
  			return walker;
  		}
docs: Creates an element walker which can only "go deeper". It won't move out from any element. Therefore it can be used to find <td>x</td> in cases like: <table><tbody><tr><td>x</td></tr></tbody>^<tfoot>...