class_docstr: A dummy heartbeat channel interface for in-process kernels.
  
  Normally we use the heartbeat to check that the kernel process is alive.
  When the kernel is in-process, that doesn't make sense, but clients still
  expect this interface.
class_docstr_tok: ["A","dummy","heartbeat","channel","interface","for","in-process","kernels",".","Normally","we","use","the","heartbeat","to","check","that","the","kernel","process","is","alive",".","When","the","kernel","is","in-process",",","that","does","n't","make","sense",",","but","clients","still","expect","this","interface","."]
docstr: Start the channel.
docstr_tok: ["Start","the","channel","."]
code: def start(self):
      """Start the channel."""
      self._is_alive = True
  
file_path: catboost/contrib/python/ipykernel/py3/ipykernel/inprocess/channels.py
imports: from typing import List
  from jupyter_client.channelsabc import HBChannelABC
label_desc: Use image node_id 3 for calling the InProcessHBChannel obj's underlying member method code with example usage: obj.start() without return types