docs: def addTab(self, widget, *args):
          """
          Re-implements addTab to connect to the dirty changed signal and setup
          some helper attributes.
  
          :param widget: widget to add
          :param args: optional addtional arguments (name and/or icon).
          """
          widget.dirty_changed.connect(self._on_dirty_changed)
          super(CodeEditTabWidget, self).addTab(widget, *args)