class_docstr: Asynchronous client.
class_docstr_tok: ["Asynchronous","client","."]
code: def __call__(self, *args, **kwargs):
      return self._build_handler("__call__")(*args, **kwargs)
  
imports: from concurrent import futures
  import datetime
  from typing import List, Optional, Union
  import zoneinfo
  from courier.python import py_client
  import numpy
  from pybind11_abseil.status import StatusNotOk
  from pybind11_abseil.status import StatusNotOk
label_desc: Use image node_id 4 for calling the _AsyncClient obj's underlying member method code with example usage: obj.__call__() and returns: self