class_docstr: Wrapper around a TreeWidget's invisible root item that calls
  TreeWidget.informTreeWidgetChange when child items are added/removed.
class_docstr_tok: ["Wrapper","around","a","TreeWidget","'s","invisible","root","item","that","calls","TreeWidget.informTreeWidgetChange","when","child","items","are","added\/removed","."]
code: def addChild(self, child):
      self._real_item.addChild(child)
      TreeWidget.informTreeWidgetChange(child)
  
imports: from ..Qt import QtCore, QtWidgets
label_desc: Use image node_id 2 for calling the InvisibleRootItem obj's underlying member method code with example usage: obj.addChild(child) without return types