'Start serving with the newly created version.
Raises:
RuntimeError: Deploy has not yet been called.
Returns:
The response body, as a string.'

def StartServing(self):

    assert self.deployed, 'Deploy()    must    be    called    before    StartServing().'
    StatusUpdate('Deployment    successful.', self.error_fh)
    self.params['willcheckserving'] = '1'
    result = self.logging_context.Send('/api/appversion/startserving')
    del self.params['willcheckserving']
    self.started = True
    return result
