def deadline(self):
        if self.estimation_value > 0:
            duration = datetime.timedelta(
                    seconds=(self.estimation_value*self.estimation_unit)
                    )
            return (self._today()+duration)
        else:
            return None
Creates the toolkit-specific control that represents the view.
dataset/ETHPy150Open ntoll/workflow/workflow/models.py/State.deadline--crossover with--dataset/ETHPy150Open enthought/envisage/envisage/plugins/ipython_shell/view/ipython_shell_view.py/IPythonShellView.create_control