class_docstr: Dynamic retrieval service client class.
  It implements the retrieval services interface, has a simple client to add, reset and query
  the dynamic retrieval index.
code: def __init__(
      self,
      tokenizer: TokenizerSpec,
      service_ip: str = None,
      service_port: int = None,
  ):
      super().__init__(
          tokenizer=tokenizer,
          service_ip=service_ip,
          service_port=service_port,
          updatable=True,
      )
  
imports: import abc
  import logging
  import threading
  from typing import List, Union
  import numpy
  import torch
  from nemo.collections.common.tokenizers.tokenizer_spec import TokenizerSpec
  from nemo.collections.nlp.modules.common.megatron.retrieval_services.util import request_data
label_desc: Use image node_id 1 to create a new DynamicFaissRetrievalService object from inherited base classes: FaissRetrievalService with example: obj = DynamicFaissRetrievalService(tokenizer, service_ip, service_port)