class_docstr: Class that chains datas
class_docstr_tok: ["Class","that","chains","datas"]
docstr: Returns ``True`` to notify ``Cerebro`` that preloading and runonce
  should be deactivated
docstr_tok: ["Returns","``","True","``","to","notify","``","Cerebro","``","that","preloading","and","runonce","should","be","deactivated"]
code: def islive(self):
      """Returns ``True`` to notify ``Cerebro`` that preloading and runonce
      should be deactivated"""
      return True
  
file_path: backtrader/backtrader/feeds/chainer.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from datetime import datetime
  import backtrader
  from backtrader.utils.py3 import range
label_desc: Use image node_id 1 for calling the Chainer obj's underlying member method code with example usage: obj.islive() and returns: True