code: def init_poolmanager(
      self, connections, maxsize, block=False, **pool_kwargs
  ):
      self.poolmanager = PoolManager(
          num_pools=connections,
          maxsize=maxsize,
          block=block,
          ssl_version=ssl.PROTOCOL_TLSv1_2,
      )
  
imports: import logging
  import ssl
  import sys
  import requests
  from requests.adapters import HTTPAdapter
  from urllib3.util import Retry
  from urllib3 import PoolManager
  import six
  from .session.defs import ENV_HOST_VERIFY_CERT
label_desc: Use image node_id 1 for calling the TLSv1HTTPAdapter obj's underlying member method code with example usage: obj.init_poolmanager(connections, maxsize, block) without return types