Returns the table type for this instance.
        
        :return     <subclass of orb.Table> || None

def tableType( self ):
        """
        Returns the table type for this instance.
        
        :return     <subclass of orb.Table> || None
        """
        if not self._tableType:
            if self._tableTypeName:
                self._tableType = Orb.instance().model(nstr(self._tableTypeName))
            
        return self._tableType