code: def sessions(self):
      return self._trading_calendar.sessions_in_range(
          self.start_session, self.end_session
      )
  
imports: import logbook
  import pandas
  from zipline.utils.memoize import remember_last
  from zipline.utils.pandas_utils import normalize_date
label_desc: Use image node_id 13 for calling the SimulationParameters obj's underlying member method code with example usage: obj.sessions() and returns: self