class_docstr: Tokenizes by making a request to the proxy server with REST endpoint: `/api/tokenize`.
docstr: The max sequence length is the same as the max request length for AI21.
docstr_tok: ["The","max","sequence","length","is","the","same","as","the","max","request","length","for","AI21","."]
code: def max_request_length(self) -> int:
      """The max sequence length is the same as the max request length for AI21."""
      return self.max_sequence_length
  
imports: import re
  from typing import List, Optional, Tuple
  from urllib.parse import unquote
  from helm.common.tokenization_request import TokenizationRequest, TokenizationRequestResult, TokenizationToken, TextRange
  from .window_service import WindowService, EncodeResult
  from .tokenizer_service import TokenizerService
  from .gpt2_window_service import GPT2WindowService
label_desc: Use image node_id 4 for calling the AI21WindowService obj's underlying member method code with example usage: obj.max_request_length() and returns: self