Returns a reference to the create item that is used for this edit.
        
        :return     <XMultiTagCreateItem>

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