docs: def createItem( self ):
          """
          Returns a reference to the create item that is used for this edit.
          
          :return     <XMultiTagCreateItem>
          """
          if not self.isEditable():
              return None
          
          if self._createItem is None:
              self.blockSignals(True)
              
              self._createItem = XMultiTagCreateItem(self)
              self.addItem(self._createItem)
              
              self.blockSignals(False)
          
          return self._createItem