code: def is_open_on_minute(self, dt):
          
          return is_open(self.market_opens_nanos, self.market_closes_nanos,
                         dt.value)
docs: Given a dt, return whether this exchange is open at the given dt.
  
          Parameters
          ----------
          dt: pd.Timestamp
              The dt for which to check if this exchange is open.
  
          Returns
          -------
          bool
              Whether the exchange is open on this dt.