docstr: The end of text token.
code: def end_of_text_token(self) -> str:
      """The end of text token."""
      return "</s>"
  
file_path: H2O/h2o_hf/helm/src/helm/benchmark/window_services/flan_t5_window_service.py
imports: from .encoder_decoder_window_service import EncoderDecoderWindowService
  from .tokenizer_service import TokenizerService
label_desc: Use image node_id 3 for calling the FlanT5WindowService obj's underlying member method code with example usage: obj.end_of_text_token() and returns: str