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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def run_until(self, endtime, timeunit='minutes', save=True):
 """ Run a case untile the specifiend endtime """

        integrator = self.case.solver.Integrator
        integrator.rununtil(endtime, timeunit)
        if save is True:
            self.case.save()