code: def _get_minute_window_data(self, assets, field, minutes_for_window):
          
          return self._minute_history_loader.history(assets,
                                                     minutes_for_window,
                                                     field,
                                                     False)
docs: Internal method that gets a window of adjusted minute data for an asset
          and specified date range.  Used to support the history API method for
          minute bars.
  
          Missing bars are filled with NaN.
  
          Parameters
          ----------
          assets : iterable[Asset]
              The assets whose data is desired.
  
          field: string
              The specific field to return.  "open", "high", "close_price", etc.
  
          minutes_for_window: pd.DateTimeIndex
              The list of minutes representing the desired window.  Each minute
              is a pd.Timestamp.
  
          Returns
          -------
          A numpy array with requested values.