code: def _default_make_pool(http, proxy_info):
      
  
      if not http.ca_certs:
          http.ca_certs = _certifi_where_for_ssl_version()
  
      ssl_disabled = http.disable_ssl_certificate_validation
  
      cert_reqs = 'CERT_REQUIRED' if http.ca_certs and not ssl_disabled else None
  
      if isinstance(proxy_info, collections.Callable):
          proxy_info = proxy_info()
      if proxy_info:
          if proxy_info.proxy_user and proxy_info.proxy_pass:
              proxy_url = 'http://{}:{}@{}:{}/'.format(
                  proxy_info.proxy_user, proxy_info.proxy_pass,
                  proxy_info.proxy_host, proxy_info.proxy_port,
              )
              proxy_headers = urllib3.util.request.make_headers(
                  proxy_basic_auth='{}:{}'.format(
                      proxy_info.proxy_user, proxy_info.proxy_pass,
                  )
              )
          else:
              proxy_url = 'http://{}:{}/'.format(
                  proxy_info.proxy_host, proxy_info.proxy_port,
              )
              proxy_headers = {}
  
          return urllib3.ProxyManager(
              proxy_url=proxy_url,
              proxy_headers=proxy_headers,
              ca_certs=http.ca_certs,
              cert_reqs=cert_reqs,
          )
      return urllib3.PoolManager(
          ca_certs=http.ca_certs,
          cert_reqs=cert_reqs,
      )
docs: Creates a urllib3.PoolManager object that has SSL verification enabled
      and uses the certifi certificates.