class_docstr: Reader for OHCLV pricing data at a session frequency.
docstr: Returns
  -------
  sessions : DatetimeIndex
     All session labels (unioning the range for all assets) which the
     reader can provide.
code: def sessions(self):
      """
      Returns
      -------
      sessions : DatetimeIndex
         All session labels (unioning the range for all assets) which the
         reader can provide.
      """
  
file_path: zipline/zipline/data/session_bars.py
imports: from abc import abstractproperty, abstractmethod
  from zipline.data.bar_reader import BarReader
label_desc: Use image node_id 2 for calling the SessionBarReader obj's underlying member method code with example usage: obj.sessions() without return types