code: def set_min_leverage(self, min_leverage, grace_period):
          
          deadline = self.sim_params.start_session + grace_period
          control = MinLeverage(min_leverage, deadline)
          self.register_account_control(control)
docs: Set a limit on the minimum leverage of the algorithm.
  
          Parameters
          ----------
          min_leverage : float
              The minimum leverage for the algorithm.
          grace_period : pd.Timedelta
              The offset from the start date used to enforce a minimum leverage.