code: function(oColumn) {
          var oSelf = this;
          var allDescendants = [];
          var i;
  
          // Recursive function to loop thru all children
          var parse = function(oParent) {
              allDescendants.push(oParent);
              // This Column has children
              if(oParent.children) {
                  for(i=0; i<oParent.children.length; i++) {
                      parse(oSelf.getColumn(oParent.children[i].key));
                  }
              }
          };
          parse(oColumn);
  
          return allDescendants;
      }
docs: Public accessor returns array of given Column's desendants (if any), including itself.
  
  @method getDescendants
  @parem {YAHOO.widget.Column} Column instance.
  @return {Array} Array including the Column itself and all descendants (if any).