code: def call_handlers(self, msg):
      self._in_queue.put(msg)
  
file_path: catboost/contrib/python/ipykernel/py2/ipykernel/inprocess/blocking.py
imports: from IPython.utils.io import raw_print
  from traitlets import Type
  from .channels import InProcessChannel
  from .client import InProcessKernelClient
label_desc: Use image node_id 2 for calling the BlockingInProcessChannel obj's underlying member method code with example usage: obj.call_handlers(msg) without return types