code: function(oData) { 
          
          if (Lang.isString(oData)) {
              oData = { 
                  label: oData 
              };
          } else {
              if (oData.style) {
                  this.labelStyle = oData.style;
              }
          }
  
          this.label = oData.label;
  
          this.labelElId = "ygtvlabelel" + this.index;
          
      }
docs: Sets up the node label
  @method setUpLabel
  @param oData string containing the label, or an object with a label property