code: def sessions(self):
      cal = self._calendar
      first = self._minute_bar_reader.first_trading_day
      last = cal.minute_to_session_label(
          self._minute_bar_reader.last_available_dt
      )
      return cal.sessions_in_range(first, last)
  
imports: from collections import OrderedDict
  from abc import ABCMeta, abstractmethod
  import numpy
  import pandas
  from six import with_metaclass
  from zipline.data._resample import _minute_to_session_open, _minute_to_session_high, _minute_to_session_low, _minute_to_session_close, _minute_to_session_volume
  from zipline.data.bar_reader import NoDataOnDate
  from zipline.data.minute_bars import MinuteBarReader
  from zipline.data.session_bars import SessionBarReader
  from zipline.utils.memoize import lazyval
label_desc: Use image node_id 6 for calling the MinuteResampleSessionBarReader obj's underlying member method code with example usage: obj.sessions() and returns: cal