code: def AddATR(self, readernode, atr):
          
          capchild = self.AppendItem(readernode, atr)
          self.SetPyData(capchild, None)
          self.SetItemImage(
              capchild, self.cardimageindex, wx.TreeItemIcon_Normal)
          self.SetItemImage(
              capchild, self.cardimageindex, wx.TreeItemIcon_Expanded)
          self.Expand(capchild)
          return capchild
docs: Add an ATR to a reader node.