code: def _target_encoder(self):
      return Seq2SeqLabelEncoder(
          self, self.config.s2s_decoder_max_length
      )
  
imports: import functools
  import numpy
  import tensorflow
  from finetune.base import BaseModel
  from finetune.encoding.target_encoders import Seq2SeqLabelEncoder
  from finetune.input_pipeline import BasePipeline
  from finetune.model import PredictMode
  from finetune.util.beam_search import beam_search, get_state_shape_invariants
  from tensorflow.python.util import nest
  import itertools
  import sys
label_desc: Use image node_id 3 for calling the S2SPipeline obj's underlying member method code with example usage: obj._target_encoder() and returns: Seq2SeqLabelEncoder