code: def emitDataChanged(self, regItem):
          
          #self.sourceModel().emitDataChanged(regItem) # Does this work?
          leftIndex = self.indexFromItem(regItem, col=0)
          rightIndex = self.indexFromItem(regItem, col=-1)
          self.dataChanged.emit(leftIndex, rightIndex)
docs: Emits the dataChagned signal for the regItem