code: def join(self):
      pass
  
file_path: pyalgotrade/pyalgotrade/barfeed/membf.py
imports: import six
  from pyalgotrade import barfeed
  from pyalgotrade import bar
  from pyalgotrade import utils
label_desc: Use image node_id 6 for calling the BarFeed obj's underlying member method code with example usage: obj.join() without return types