docstr: Returns
  -------
  sessions : DatetimeIndex
     All session labels (unionining the range for all assets) which the
     reader can provide.
docstr_tok: ["Returns","--","--","--","-","sessions",":","DatetimeIndex","All","session","labels","(","unionining","the","range","for","all","assets",")","which","the","reader","can","provide","."]
code: def sessions(self):
      """
      Returns
      -------
      sessions : DatetimeIndex
         All session labels (unionining the range for all assets) which the
         reader can provide.
      """
      return self._bar_reader.sessions
  
imports: import numpy
  import pandas
  from catalyst.data.session_bars import SessionBarReader
label_desc: Use image node_id 8 for calling the ContinuousFutureSessionBarReader obj's underlying member method code with example usage: obj.sessions() and returns: self